Many cross-chain bridge projects in the market blindly chase incentive tokens but overlook the actual sources of income. Some projects, however, have built a more solid economic foundation. The key lies in three revenue streams: bridging fees, earnings from idle assets during routing, and integration fees. The brilliance of this model is that—after the initial incentives fade—the connectors can still continue to profit. Through the coordination mechanism of MPC multi-party computation, projects can maintain L1 Bitcoin as the core support and build a sustainable ecosystem income. This marks a shift from speculation-driven to fundamentals-driven development.