This might just be the niche I'm doing, but this is rediculous. Whenever I submit more keywords about half get declined. When I look at the other sites bidding on the same keywords, it's clear that mine has more related content and is obviously more relevant. Not to mention out of nowhere I will get a few random keywords hand removed from my campaigns. I have come to the conclusion that it is just a matter of who is reviewing your keywords to determine if they will be approved or rejected.