In my opinion the interface of these websites is one of the most important factors in retaining viewers.  For example Dsound doesn't produce as much revenue as say Steemit.com or D.tube, and I think one of the reasons for that is people are a bit off put by the interface.  They still don't have playlists, or even a search bar.  You can't even search through tags unless you click on the tag on someone's post.  I like Emanate, but I hope Prc gets back to updating Dsound.