ByteDance core chooses a monthly subscription model, with four key reasons: 1. Lock in users to increase frequency and stickiness; the more they use, the less they leave; 2. Stable cash flow to cover rigid computing power costs and plan investments precisely; 3. Filter high-value users to build a paid ecosystem and achieve full user coverage; 4. Benchmark against GPT to position in the high-end market and establish a "top-tier" brand perception. Short-term criticism, long-term positioning.