takes the same cut from each key sold as every other platform

That is just blatantly wrong. Steam takes 30%, Epic takes 12% after the first $1M.

Since Taiwan is “already part” of China, that would just be internal affairs too.

They’d certainly have fewer.

While I, to some extent, agree with you; it is predatory behaviour by those companies and I don’t like it.
And some people are weak to such practices. Customers have to be protected from themselves to some extent, as has been shown in other industries.

Right?

Companies would never employ predatory behaviour to prey on customers, and have never had to be regulated before. It really is the customer’s fault for engaging.