if they do anything that pisses off the community they'll end up losing users to rival games and lose money
What (legal) alternative was there when The Tetris Company made the infinite spin feature of Tetris Worlds official despite reviewers' claims that "it actually breaks Tetris"? That's as if basketball players had to switch to netball or team handball, or if American football players had to switch to rugby. Not all skills transfer.
Furthermore, while traditional games and sports are public domain, the entities that organize the events are not very different from your standard corporation. Anyone that can potentially do or say something that can potentially go against their or their partner's interests can be put out of the game.
Black players kicked out of Major League Baseball started parallel Negro League. Had the National League and American League been able to assert actual exclusive rights over baseball, there might not have been a Negro league or any other independent professional baseball promotions. Heck, there might not have even been an American League.