Board Thread:General Discussion/@comment-25258875-20141002110020/@comment-1038387-20141002111700

It's simply a unofficial cross-promotion thing with wikis with similar subjects. If you have a wiki about a show or franchise, you affiliate with a wiki about another of the creator's shows, or the network's other shows, or shows or franchises aimed at the same audience. Things like that.

It's an opportunity to boost visitor numbers, and at the same time, allow fans to explore new waters.