User blog comment:Meighan/Introducing the Admin Support Team/@comment-5213747-20120620021203/@comment-2200849-20120621174114

The only occasions of separation, as with Uncyclopedia's and Memory Alpha's user databases, occurred only with wikis that were moved to Wikia after they had reached a considerable side and therefore could not be merged. But I don't think there's such a growth limit for Wikia wikis&mdash;it's unlikely.