gts6 said some good ones. I also like rocketprofit and neverblue ads.
neverblue falls somewhere in the middle of the pack somewhere, definitely not in the top group of the most honest. they sometimes shave 25% or so of your leads. my experience with rocketprofit is still pretty limited, but so far they seem like one of the better ones, only time will tell.
Thanks for the heads up. I haven't used them yet, but will definitely not after receiving this piece of info.