I bet 95%+ of their views are through YouTube's interface.
exactly, I hate their layout. I'd rather pull up youtube, search for the artist, click their vevo and see the video there on youtube. Vevo needs youtube more than the other way around.
You probably haven't set up any filters. You go look for the ABP icon on your browser and click "Filter preferences..." then "Add filter subscription..." I have Fanboy's and EasyList.