I believe they are pretty strict about what domains they accept. I think it's all about the quality of one's domains and what kind of traffic potential they have.
Skenzo wants the BIG traffic domains and BJ is there to pick up the domains with good keywords/topics and respectable but not huge traffic levels. I managed to get a few accepted but BJ didn't get back to me until a LONG time after I submitted them. Originally I thought I had been rejected because I hadn't heard back, several weeks passed and an "acceptance" email appeared out of the blue....
Good luck to you!