AdsKeeper is good for publishers. If you have 4000 unique visitors per day or even more, and have not yet been accepted by Google Adsense. Was your site was banned by Google Adsense? Maybe you are looking to supplement your source of income by combining AdSense and any other ad network. Requirements are not that very strict as other native Ad networks. The client's support team is highly talented and responsive. I worked with them for more than 3 years and never had any problem.