MARA Foundation vs Brink vs Spiral: Reshaping Bitcoin Core Development Funding and Long-term Security Landscape

The Bitcoin protocol has been running for over 17 years, supporting a global network with a market capitalization of more than $1.49 trillion. But one persistent unresolved question is: who will pay the developers maintaining this protocol?

On April 27, 2026, at the Bitcoin 2026 conference in Las Vegas, this question received a structurally significant response—Nasdaq-listed mining company MARA Holdings (NASDAQ: MARA) officially announced the establishment of the MARA Foundation, explicitly including quantum resistance research, open-source developer funding, and long-term Bitcoin security budgets as core missions.

This is not an ordinary industry charity effort. The MARA Foundation is the first to be initiated by a publicly traded Bitcoin mining company with the primary goal of funding protocol layer development and long-term security research. Its emergence marks a structural expansion in the landscape of Bitcoin development funding.

One mining company, one launch event, one community vote

On April 27, 2026, MARA Holdings officially launched the MARA Foundation at Bitcoin 2026. The foundation will operate independently of MARA’s core business, focusing on five key areas: long-term security (including quantum resistance research), open-source technology development, self-custody tools promotion, policy advocacy, and global user and developer education.

As a kickoff, the foundation allocated its first $100k donation, with the beneficiary organization decided through an open community vote. The three candidates are: SateNet, providing low-cost wireless networks for southern global communities; the 256 Foundation, funding open-source mining hardware and software development; and Libreria de Satoshi, dedicated to multilingual Bitcoin technology education. The voting window closes at 3 p.m. Pacific Time on April 29.

Simultaneously, MARA’s CEO Fred Thiel made a statement worth quoting in full, which is also the best entry point to understand this event: “We mine Bitcoin. We help protect this network every day. That gives us a responsibility—not only to focus on its short-term economic gains but also to invest in the protocol’s long-term health.”

Why now? From halving pressures to quantum anxiety

The “volunteer dilemma” in Bitcoin development funding

Bitcoin Core, as the fundamental software underpinning the entire network, has long relied on a small number of volunteer developers for maintenance. This vulnerability has been repeatedly discussed in industry discourse. Data from 2025 shows Bitcoin Core has about 41 active developers (excluding test engineers and Lightning Network researchers), with roughly 285,000 lines of code modified throughout the year. Compared to traditional financial infrastructure of similar scale, this investment is extremely limited.

Profit squeeze after the halving

After the April 2024 fourth halving, block rewards dropped to 3.125 BTC, nearly halving miners’ income. In 2025, the industry’s profit model further deteriorated. Listed miners’ weighted average cash cost of mining rose to about $79,995 per BTC, while Bitcoin prices fluctuated between $68,000 and $70,000, resulting in a loss of about $19,000 per BTC. These figures create a tangible pressure for miners to diversify.

Quantum issues shifting from theory to engineering schedule

Quantum vulnerability of Bitcoin is not a new topic, but in 2026, multiple forces pushed this issue to the forefront. On March 31, Google Quantum AI released a white paper estimating that the quantum resources needed to break Bitcoin’s secp256k1 elliptic curve cryptography are about 20 times lower than previously thought—only about 1,200 logical qubits could pose a threat. Coinbase’s advisory board subsequently issued a clear warning: quantum computers will eventually be built, and the window for industry upgrades is narrowing.

Meanwhile, BIP 360 (Pay-to-Merkle-Root), a core technology proposal for Bitcoin’s quantum resistance migration, was officially added to the Bitcoin Improvement Proposal (BIP) repository at the end of 2025, still in “draft” status. BTQ Technologies completed its first functional deployment of BIP 360 on the Bitcoin Quantum testnet in March 2026, verifying the usability of P2MR output types in testing environments.

The AI transformation wave among miners and MARA’s unique path

In 2026, Bitcoin miners are undergoing a structural transformation. Core Scientific converted its 300 MW Picosas, Texas, facility into a 1.5 GW AI data center, costing over $4 billion. Hut 8 issued about $3.25 billion in investment-grade bonds for AI data center construction. IREN signed a $9.7 billion GPU cloud service agreement with Microsoft. The overall industry trend is shifting from “pure mining” to “hashpower providers.”

MARA is also on this path— in March, the company sold 15,133 BTC (about $1.1 billion) to buy back convertible bonds, and cut 15% of its staff, accelerating its transition into AI and energy infrastructure. Yet, while engaging in large-scale asset disposals and restructuring, establishing a foundation focused on protocol health—this “convergence and investment” approach—makes MARA particularly distinctive amid the mining industry’s transformation wave.

The structural significance behind the $100k initial funding

At first glance, the initial $100k grant from the MARA Foundation seems modest compared to the industry’s typical million-dollar donations. But viewing this figure in isolation significantly underestimates its structural value.

Horizontal comparison: overview of Bitcoin developer funding organizations

The fundamental difference between MARA Foundation and others is not the size of funds but the source of funding and incentive logic. Brink and Spiral mainly rely on institutional donations and personal charity commitments, operating like traditional non-profits. MARA Foundation’s funding derives from the profits of a Bitcoin mining enterprise—an entity deeply embedded in Bitcoin’s protocol economy. This means its motivation for funding is directly linked to the network’s long-term economic security.

Self-funded vs. community-voted: the logic behind the initial donation

The foundation adopts a “pre-screened institution + community vote” dual selection process—MARA pre-selects three candidate organizations, with the final decision made by the community. This approach achieves multiple effects: ensuring candidates align with the foundation’s mission; reducing community manipulation risks; and creating engagement and momentum at launch. Notably, among the three candidates, 256 Foundation explicitly focuses on open-source mining hardware/software development, closely aligned with MARA’s core capabilities, hinting at future funding that balances “public value” and “ecological synergy.”

Disclaimer and independence

The foundation’s website states that quantum computing does not pose a direct threat to Bitcoin, but early preparation is crucial given the network’s deliberate upgrade cycle. This cautious stance sets a pragmatic tone—funding preemptive technical reserves rather than inciting panic narratives.

Industry perspectives: three levels of industry review

Regarding the MARA Foundation’s establishment, industry sentiment spans “welcome, concern, and skepticism.”

Support: miners’ sense of responsibility

The most straightforward support logic is: miners earn huge profits from Bitcoin and should give back to maintain the network. Bitwise’s chief investment officer Matt Hougan previously emphasized, “Without Bitcoin developers maintaining the network, ETFs themselves cannot track”—this logic applies equally to miners. As one of the largest Bitcoin miners by hashpower and the fourth-largest holder by holdings, MARA’s founding of a foundation is seen by some observers as a “signal of ecological responsibility awakening.”

Concerns: insufficient scale and sustainability

The initial $100k funding may seem small compared to MARA’s status as a top-listed miner. But this is not the whole story: key unknowns include future funding sources, correlation with MARA’s operational performance, whether an independent asset pool will be established, and whether a profit-sharing mechanism like VanEck’s will be adopted. The foundation emphasizes independent operation but has not disclosed details about an independent board or external audits, raising questions about long-term governance transparency.

Skepticism: “whitewashing” or “hedging” narratives

More pointed doubts target MARA’s current transformation strategy. In March 2026, the company sold 15,133 BTC (~$1.1 billion), reducing holdings from about 53,822 BTC to 38,689 BTC—a decrease of roughly 28%. Against the backdrop of industry-wide reductions in Bitcoin hashpower and a shift toward AI infrastructure, establishing a foundation focused on protocol health is interpreted by some as a move to “legitimize industry relations.” Critics see this as symbolic rather than substantive.

Notably, Fred Thiel publicly stated at the launch that “Bitcoin’s future is not guaranteed.” This statement sparked divided interpretations on social media—some see it as a sober expression of long-term commitment; others view it as revealing miner doubts about Bitcoin’s ecological confidence.

Dissecting three core propositions

Proposition 1: “First miner-founded protocol development fund”

MARA Foundation is not the first funding entity related to miners. Previously, Brink received donations from Compass Mining, but Compass is not a foundation. Labeling MARA Foundation as “the first protocol development fund systematically initiated by a publicly traded miner” is accurate, but its scale, governance, and long-term commitments remain untested.

Proposition 2: “Focus on quantum resistance research”

The foundation explicitly prioritizes quantum resistance research, which is justified by three reasons: the Google white paper’s focus on quantum threats in 2026; BIP 360 providing a concrete engineering migration path; and the foundation’s positioning helps differentiate itself in the existing developer funding landscape dominated by Brink and OpenSats. However, “focusing on quantum resistance” does not mean “leading” it—details about research teams, academic collaborations, funding mechanisms, and execution plans are still unclear.

Proposition 3: “Independent operation”

The foundation claims to operate independently of MARA’s core business. Legally, this usually means separate registration and bylaws. But financially, it still depends heavily on MARA’s profits, meaning its “independence” is operational rather than purely financial. Its independence should be understood as structural separation rather than complete financial independence.

Industry impact analysis: why do miners need to “give back” to the protocol?

The MARA Foundation’s establishment transcends a single organization—it touches a fundamental structural issue: in Bitcoin’s ecosystem, miners are direct PoW participants earning block rewards and transaction fees, while protocol developers are “public goods providers”—contributing the most but with the weakest incentives.

This asymmetry has long relied on three mechanisms: volunteer spirit and personal investment; charitable donations from non-miner enterprises (e.g., Jack Dorsey’s Start Small, VanEck’s profit-sharing from ETFs); and a few corporate sponsors (e.g., Chaincode Labs’ ongoing developer support). Miners, as the most immediate beneficiaries of the ecosystem, have historically been absent from this funding landscape.

The emergence of the MARA Foundation signifies that miners are entering the developer funding system in an institutionalized way for the first time. If other large miners (e.g., CleanSpark, Riot Platforms) follow suit, Bitcoin developer funding could form a more stable triangle: directly dependent on protocol-derived profits; ETF issuers based on Bitcoin assets; and individual/community donations.

Multi-scenario evolution: where might the foundation go?

Based on current disclosures and industry context, four potential paths can be envisioned:

Scenario 1: Focus on quantum resistance, becoming a specialized research funding platform

The foundation deepens investment in quantum resistance, establishing collaborations with academia and engineering teams, playing a coordinating role in BIP 360 promotion and post-quantum wallet development. In this scenario, it becomes a “Bitcoin quantum security research” flagship fund, with influence rooted in expertise rather than scale.

Scenario 2: Evolve into a multi-stakeholder governance ecosystem fund

The foundation expands its funding scope, establishes an independent board, attracts diverse donors (including other miners, ETF issuers), and develops a multi-beneficiary governance model similar to open-source foundations. This reduces brand dependence on MARA but enhances resilience and industry representation.

Scenario 3: Maintain small-scale operations, serving as MARA’s ecosystem coordination tool

The foundation sustains a model of small grants and community voting, functioning as a brand builder, industry relationship maintainer, and technical investor within MARA’s strategic framework. Funding fluctuates with MARA’s performance, lacking independent growth potential.

Scenario 4: Funding commitments fall short, promises unfulfilled

Industry downturns, MARA’s financial struggles, or prioritization of AI infrastructure could lead to insufficient funding, project stagnation, and credibility damage—serving as a negative example for industry commitments.

Assuming MARA still holds about 38,689 BTC (roughly $3 billion at April 29, 2026, BTC ~$77,295), and considering the relatively small scale of protocol development funding, scenarios 1 or 2 are more plausible as guiding directions.

Conclusion

The establishment of the MARA Foundation is a signal event—modest in scale but profound in implication. A miner reducing its hashpower investment and choosing to “reverse invest” in protocol health through a foundation reflects a noteworthy industry attitude shift.

Bitcoin’s decentralized governance ensures no single entity can control the protocol’s future, but the responsibility and feedback behaviors of deep participants form the underlying pillars of protocol prosperity. The long-term value of the MARA Foundation lies not in the initial $100k check but in whether it can demonstrate that mining profits and protocol health can engage in a more complex, mutually beneficial interaction than passive extraction.