Good suggestion, but personally I don't like them.
I tried working with them and they don't seem to understand anything about email marketing. As far as I remember they wanted me to mail images that looked like oversized web banners, and that's how they performed.
After all, I doubt they will pay you $2+ per click, and that's what I'm currently earning form CPA offers (and they are monetizing through CPC feeds themselves, probably with nice margins).
By the way, I should have mentioned in the OP post that email is my only traffic source.