Thread:Suminoma/@comment-5916303-20170130093848/@comment-24527343-20170201201109

It serves the same purpose as it has been doing: being a category for all of Markiplier's collaborations. The "videos featuring [wah]" categories simply go into more detail, listing all collaborations between Mark and a single other person. Think of it as a parallel to the "Games" category including all games Mark has played, and each genre category going into more detail, listing all games of a specific genre or other characteristic that Mark has played (like survival horror, for example).