They game SEO to flood search results with articles that are pure, useless placeholders which most of the time will never be written. Even when they're more than a placeholder page, they're often wrong outside of a few games because they're just there to get clicks. Downvote bots were used against links to competing wikis, and while Fextralife denies it, they were conveniently spared.

There is more shady behavior out there around Fextra, but the most important thing for a user is there is almost always a better wiki that's being suppressed in the search results. If you blacklist the site you're a lot more likely to find something useful.