Yeah, what's up with that? I mean, it's the perfect solution for wikipedia deletionism: one wiki for each niche.
How could they screw it up so badly? Every time I go there it's a mess of autoplaying videos, annoying banners, even ads...
Gotta make the most profit possible. At any cost.
Man I hate what the Internet became. Once upon a time your Internet connection would have come with some hosting space that you could use to put up a wiki for your favorite show or whatever. Not any more. Now it's just a pipe to an endless series of people eager to give you a space to put your content that's framed with ads.
As a concrete example, searching for "Rabi-Ribi wiki" for info regarding a somewhat obscure 2016 Japanese platformer bubbles up the usual Fandom spam garbage to the very top, followed by a copycat site "PCGamingWiki", followed by more generic information such as its Wikipedia page. It's only if you get to the second half of the second page results that you'll find a link to RabiDB [1], which is extremely comprehensive, ad-free and documents pretty much every detail about the game.
In a similar vein regarding the original comment, there are a lot of forums with very active user bases that will never show up at the top of Google results. I still post in one regularly with ~300 daily active users who have all known each other for years, for the most part. We'd never show up anywhere near the first page of a Google search result, though, so we essentially don't exist on the modern internet. I imagine countless other forums are in the same boat.
Both games are fairly popular within their spaces, but not mainstream or AAA.