OSRS wiki isn't the best example. Jagex does not fund it, and is recommending they move to fandom/ad based support.

Despite the OSRS wiki being legitimately the best website I use every day, it's leadership has been sounding the death knell every few months, always to an alarmingly quiet response.

They have no money, have no revenue generator, and have a full staff that needs to be paid. The last post they put to the community mentioned moving back to fandom (crazy) or injecting ads at a pretty insane volume.

So yes, fandom sucks. But also, a "normal" wiki takes expertise, and usually, compensation.