Good advertiser for popunders?

Site is a PR7 site featuring entertainment industry and geek news and reviews. I can probably deliver about 6,000 uniques a day +/-. It’s an old, established site with a premium domain, regularly updated, totally white hat. I’m approve for Adsense API and by Tribal Fusion, so you wouldn’t think I’d have a problem getting advertisers.
I work well with advertisers, normally. They pay my bills, I cheerfully comply with their requirements.
However … Casalemedia just turned me down — which kinda shocked me. Site’s absolutely white hat :confused: and has good, original, content.
(Tribalfusion’s overall CPM is good, but their CPM on popunders has stank like gym socks lately. It’s less than the CPM on their 468X60 banners!)
So Casalemedia is a no, and I’m approved for Tribalfusion but not real happy. Who else do you guys recommend?
– Leva

See original post by LevaCygnet