I've had a collection of video clips there for a while now, and only a very few sales.  Their inspection process for stills appeared to be quite subjective, unpredictable, and unreasonable, so I won't be uploading any more.  It's possible that the difference in cultures plays a large part.  My video sales are much better on Pond5, so I haven't uploaded any material to Clipdealer in quite a while.  I have found their customer service to be very responsive.

Although I've been selling video clips on SS for some time now, I have yet to be accepted as a still photographer.  After four unsuccessful attempts, my fifth attempt included ten photos that had all been approved in one of my previous attempts.  (I didn't reach the requisite seven out of ten in my previous attempts, but some of the photos were approved.)  Much to my surprise, the photos that were approved previously were disapproved!  It even included photos that have sold on other sites!  It seems that the initial batch of ten is a moving target.