The API relay arbitrage model, often referred to as a "transit station," has gained traction among former crypto airdrop hunters who now operate as "API transit station" operators. This model capitalizes on price differences and access barriers in global AI services, allowing operators to provide foreign AI vendors' API tokens to domestic users at lower prices. Despite challenges such as privacy, security, and compliance, this sector continues to attract individuals and small teams. The operation involves acquiring low-cost tokens through various means, including enterprise support programs and cloud credits, and reselling them to end users. However, this model carries significant risks, including data leaks, privacy breaches, and service interruptions. Users may unknowingly contribute valuable training data, and there is a risk of model downgrades or substitutions. While the business offers potential profits, it is fraught with instability and compliance issues, making it a risky venture for long-term sustainability.