I gave up on BuySellAds, they turned me down three times without reason. My site gets more traffic then any other sites they have in that same niche, it follows all of their rules (nothing adult related or inappropriate), and it's better designed than the majority of their sites.
So, I sell my own ads directly now. I can get some of the biggest names in the tech industry excited about running ad campaigns on my site for $10k a week, but apparently that wasn't good enough for BuySellAds. Their loss, they're not going to get my business at this point.