If you rely on the good graces of Apple/Google/Twitter/Facebook/MonolithOfTheWeek for your business to survive, eventually you're going to have a bad time.

Twitter and Facebook entirely eradicated based around their API's.

In Apple's response to Epic, they make the case there is absolutely no way to define them as a monopoly, since even just for Fortnite, there are a half dozen competing platforms of which they note, the App Store isn't even the biggest one.