Danny "Monorail Guy" Toughpigs said above that, and I quote: Wikis on Wikia operate under GFDL, a free license that allows people to reuse the content in any way, as long as it's under the same license and links back to the original source. Wikia provides complete database dumps for anybody who wants them, so it's easy for people to move the content somewhere else if they want to. The moved content should link back to the original wiki, using a template like this. The GDFL itself can be seen on this Wikipedia page. Frankly, my head's spinning, but three things leap to the eye: