can I stop these from appearing on my website? Those big anoying ads started appearing few days ago, and I only have around 600 page impresions/day (800 visitors and 2500 pages/day in my awstats). and now.. my CTR is the same, but my income is much lower.. probably those ads pay much less. I most likely can ban them from ad filter list but others will appear and for 600 page impressions they pay crap. any advices? should I e-mail google and tell them I dom't want that king of ads on my site?
You can block the advertiser, but you can only block so much advertisers. However, just try to block it, you'll probably won't receive that much CPM ads.
If you know which ads are CPM ones, you can block their URL using Competitive Ad Filter and they won't show up.
It's hard to block them all, and frankly, you'll be wasting your time. New ones will appear and you'll still be swamped with 'em.
it's easy to identify them, they look like this one in the header of DP. the problem is how can I block them all.. some others will appear..can't spend my time searching them on my pages.