I assume it's about the wikis that are just ad-filled copies of other wikis.

No, they're not. Fextralife especially is filled with information that's often wrong or misleading.

My complaints on Fexelea could fill a book. She started that site with help, including the building of said site, from people on PSN. She then stole from reddit rampantly, but forswore ads so people didn't complain much. But she monetized her youtube channel and would only post videos (often 4+ hours with no timestamps- which was also against her own site's rules), when people complained she began allowing 'approved uploaders' (read- kicking her down her percentage). Wasn't long before ads were all over the place. Around the time Bloodborne was released she gamed SEO with names of pages with lorem ipsum and the oage itself would read 'coming soon', or 'be the first to add to this page' while other site already had the information.

Recently she began begging for funding with banners a la Wikipedia.

That site can suck a big one.

I didn't know about all that backstory, thanks for sharing that. Another reason to not use it.