In any case it's the users who built these companies by using their platform. It's users who need to rally and migrate away in solidarity with those being banned or whatever it may be. I'd say expecting companies to not do whatever they consider is in their best interest is what's not reasonable nor realistic. A company exists to make money; if banning certain users advances that mandate then it's free and expected to. Again, unless there's some legal basis to counteract that decision.