Re: Sorry, China.
In some ways we already have certain effects resulting from the “recommendations” and “feeds” limiting the reach of what people say. Of course one would argue that “interest” based valuation is not really censorship, but how are we able to say that if the “algorithms” are not documented? YouTube would be a prime example where things like automatic shadow banning are a thing too.
We have something comparable, we just don’t call or recognise it as censorship.