And yet they're hypocrites about that: they have instructions about how to circumvent the Chinese firewall on their site, which is clearly intended to have the Chinese break Chinese laws. It's not the fact they do censorship, it's the fact they measure with two measures (?) - yes to git and fuck, no to retard, yes to removing illegal stuff, no to respecting Chinese content laws, etc.
What should Github do? Ignore rule of law? Not offer service in countries with oppressive regimes? Provide tools to avoid censorship?