In terms of cost, 7Search is probably the most cost-effective ad network. It has low per click minimums, high conversions (though this depends on the niche) but also high numbers of fraudulent clicks, as some marketers complain. Nevertheless, even with these allegedly high numbers of fraudulent clicks, it is still a very good alternative to Google AdWords.

How to remove unwanted suggestions shown by the search engines, when we type words for search?