User blog comment:Simant/CC-BY-SA 3.0 - On Wikis/@comment-1417834-20140319005024/@comment-1417834-20140329203827

@Superdadsuper, I know they weren't from wikia originally, and wikia didn't chose to let them keep their license as that type, they were obligated to by the terms of the license to stick with the same license or a later license with the same license elements (later version of cc-by-nc-sa). The point is that Wikia put in a waiver to change the terms of the license for everyone for all time - past, present, future.