Lately my impressions and clickthrough rate are the same as always (pretty high for both) but my earnings are about 1/3 from what they were just a few months ago. I think it is from the advertisers who pay a certain amount for every 1000 ads, not per click. Is there any way to track those advertisers, and block them, so that the true PPC advertisers get better results on my site, and thus earn me more money? Thanks in advance. -RonMo
Yes there is (kinda), but then you have to know WICH ads. That you cant find out, so my guess is that you just have to try. In the adsense control there is something called "Competitive Ad Filter" under "AdSense Setup".
Also, there is a thread on the forum where someone compiled 200 or so advertisers that pay very less 1 cent etc. So you can use the list to block them too.
Take away low CTR adsense blk, especially if they appear first in your source code. Focus your firepower at the high converting CTR for better eCPM. At least that's what work for me. Iused to get less than $5 from 50+ clicks, nowadays , it is easily 3x more than that.