AdMob sucks. IMO they do this on purpose to discourage small publishers. I've also heard, from a reliable source, that they also send you worse traffic until

AdMob sucks. IMO they do this on purpose to discourage small publishers. I've also heard, from a reliable source, that they also send you worse traffic until your account is more "established", and if your early CTR sucks, you may never get the bump. I've heard of people having to start new accounts after their first few campaigns do poorly. I suggest you try InMobi and AdModa. (Not affiliated with either except that I've been happy with the traffic I bought there)