User blog comment:Jenburton/Announcing Wikia Day, 2011/@comment-655-20111213184736/@comment-655-20111214185026

With, I believe, more than 200K wikis, there will be enough duplicate wikis that do have enough content for deletion to not be an option.

Merging those would benefit both potential users (more content in one place) and Wikia (one wiki with much content attracts more users / generates more ad-views than several tiny ones), and the proper integration of articles from different wikis into one whole would be a good task for first-time editors: no need to generate content out of thin air, just copyedit, rename, add links&categories.