Wikis don't really need too much SEO though. If there's one good wiki, chances are it'll pop up on the first page somewhere when you google "minecraft [game-specific term]". And from then on you know to use that wiki, and just go directly to their website instead of googling.
Terraria's wiki has been running independently of Famdom for a while now, so has Paradox's, Guild Wars 2's, etc etc.
NotTheOnlyGamer