> There are some levels of censorship
Except that here is no censorship to be seen.
A censor was a state/government official that approved material before it was allowed to be published. It started to become a thing after the printing press revolutionized publishing. You had it in monarchies but also republics (e.g. during Napoleons oppressive regime over europe). And even in recent time, e.g. in socialist 1) countries they had embedded "party secretairs" that checked stuff.
So, censorship as a) from the government and b) checked before publishing to the general public.
In capitalism or --- what we actually usually have --- a social market economy a company is free to get into contracts or not. So if some company say "I don't want to do a contract with people creating XYZ apps" ... than that's not censorship. It's not from the government and no check process before the publishing process happens. It is just freedom ... the freedom of the company in this case.
In some countries the freedom to engage into a contract or not is sometimes limited, e.g. if some service is very important (like electric power, water, banking). But a source code hosting site won't qualify for this.
Executing your own freedom isn't censorship. If e.g. Fox News decides to not broadcast 1:1 a statement of the CCP made ... then this isn't censorship.
But if a US republican regime says "You can't publish info on homosexuality in school books" and some government entity checks these books ... than that's censorship.
1) I mean real socialist ex-countries like GDR or USSR, not what some US people that never heard about "means of production" call socialist, like FRG