Though, the US, British or Canadian government doesn’t collect that much info on their citizens and citizens of other countries in large databases. They have laws that limit the amount of government surveillance. We can argue if they’re strict enough etc, but at least they exist. Which isn’t really the case for China. So it’s fair to treat them differently. And by the way other countries also sometimes cut down on what’s allowed to transfer to the USA in a similar way, since for example the NSA is free to collect lots of data on foreigners. And legislation is just different. But that’s been usually for other services. Cutting down on social media altogether (instead of just have them pay a hefty fine) is a relatively new thing.