I'm going to claim that the majority of those users are optimizing for cost and not correctness and therefore the quality of data collected from those sessions is questionable. If you're working on something of consequence, you're not using those platforms. If you're a tinkerer pinching pennies, sure.

ChatGPT, Gemini and Claude are banned in China. Chinese model providers are getting absolutely massive amounts of very valuable user feedback from users in China.

This is a weird dichotomy and I don't agree with it. You don't need to have bags of money to burn to work on serious things. You also can value correctness if you're poor.