Your point about corporate governance being a generally bad thing is valid, but I don’t think this case is anywhere near that.

A “user” and a “streamer” are two different things. Anyone can create an account and be a viewer who consumes content on Twitch. That’s not the same as being a content creator who draws viewers to the platform and implicitly represents the brand.

You can go scream racist nonsense in the town square and then quietly shop at Whole Foods. But if a Whole Foods employee was found screaming racist nonsense in the town square, Whole Foods might fire them for it, and they are well within their rights to do so.

Obligatory “I know streamers aren’t employees.” Their relationship to Twitch is similar enough to that of an employee that the same logic applies.