Just put Image Ads from DoubleClick DART along with AdSense, only 3 days back. And seen AdSense eCPM becoming lower day by day. Earlier it was steady for several days. Is it true that if I run any Ad from 3rd party server such as DoubleClick or LinkShare etc., Google media bot does not like them and AdSense eCPM and earning drops as a result? And, Is it within AdSense TOS that I can run DoubleClick or other image Ad with AdSense...just a quick question.
I have never heard of such thing. It may be just a coincident. for the "serveral" days that it went up is because it was weekdays and the "3 days back" is weekend, so eCPM dropped? and then could also be it's a new month and people re-evaluate their ad budgets and pulled out. There are 100s of factors that could effect your eCPM, but I dont think DC has anything to do with it.