Wikia is a great example of enshittification - provide great value to users, then take it away from users and hand it to other businesses (eg advertisers), then take it away from businesses too.
Will Weird Gloop inevitably suffer the same fate? I hope not.
The article explicitly covers this question. Looks like they're setting up explicit legal(?) agreements. One key point is the domain name: minecraft.wiki, for example, not a subdomain of something owned by Weird Gloop. So the wiki can leave if it wants to.
I find this tends to happen when something passes on from its creator to someone else. Wikia/Fandom has passed hands a bit.
Other people just have very different values and the direction of an organization reflects this.
> Will Weird Gloop inevitably suffer the same fate? I hope not.
Unless explicitly structured to prevent it, my bet is it will. If it's backed by a for-profit entity, it'll eventually need to turn a profit somehow, and users/visitors are the first to lose their experience at that point.
However, if Weird Gloop is a properly registered non-profit with shared ownership between multiple individuals, I'll be much more likely to bet it won't suffer the same fate.
I skimmed around a bit on the website to try to get an answer to if it is an non-profit, but didn't find anything obvious that says yes/no.