The WoWWiki and RuneScape Wiki communities ditched Wikia due to them plastering the fuck out of their wikis with tonnes of intrusive ads.
Heck, the WoW community had to ditch Wowpedia (WoWWiki’s successor) to found a new wiki because Gamepedia was bought out by Fandom, the company that Wikia eventually became. Fandom ended up pulling the exact same shit soon after.
As for RuneScape, its wiki is hosted by Jagex themselves.
Musk buying Wikipedia and the Wikimedia Foundation would end in financial disaster. Nothing would be stopping people from jumping ship to an alternative.