I think this would be immensely helpful for niche topics

This.

I dont know how many people here are aware of Fandom, formerly known as Wikia. Basically what they are trying to do is collecting niche topic wikis in order to profit as much as possible. Very much criticized over the years by contributors for their practices.

Ibis could be the answer for niche wikis who dont want to be associated with Fandom/Wikia.