A little situation i've been dealing with ever since the QS thing came down is that they seemed to remove a few certain keywords from listings. These are adult keywords, but they are not crass, horrible or anything like that, and in fact longer tailed versions of the keyword are ok. It just seems like some of the really popular keywords are extremely hard to get a high quality score on (which makes sense), but there is little competition (which doesn't). Why is that? Thanks