When you play in someone else's sandbox, you're going to have to deal with their rules. No one is guaranteed an audience.
You can argue that Blizzard was well within their rights in punishing Blitzchung, but then Blizzard's audience is well within their rights to be upset with said punishment.
Actually, you don’t have to accept that. That’s what moderation is for.
Is it now? Parler shows that if you rock the boat, your hosting will be pulled and your phone app removed. Google censors a certain page that was the successor to r/The_Donald on Reddit, along with another certain chan style site. Similarly Gab got payment processors and hosting pulled out.
Now I have never bothered to explore these sites, but if their public image is telling of the truth, then I deplore the political narrative within them. Yet they still paint a real clear example that companies can and will screw you over if they want to, with not a whole lot you can do about it.
The idea is that if the platform owners don't want it, a platform user should respect that choice.