It doesn't surprise me at all that people have become less willing to contribute to wikis, now that the likes of Fandom/Wikia and Fextralife are the dominant wiki hosts. Who wants to give away their free labour and time to profit corporations, and have their work mired in cesspools of obnoxious advertising, awkward javascript interfaces, and web tracking?
I think what we need are independent wiki hosts. For example, have a look at https://bg3.wiki/