I have looked them I don't think that they are good as Google AdSense. Its like a infolinks ads network
Mind you in the time you decided to reply to a 2 year old post, the advertiser would have "evolved" just a shame so user have not evolved over this time and still opening up old threads...........
I tried this website to get traffic from them but they are not good enough. If you are interest to this website service you have to have strong keyword