I don't quite get what you mean. I have a site that is getting about 60% paid to click ads and 40% CPM ads. Now I can definately not really improve the ecpm on the CPM ads as no matter where I put them I will most probably still earn the same apart from if I put them near the top then more advertisers may bid for ad placement on my site. Now I have optimized all the ads so that I can try and get a good CTR, but 40% of the CTR that I get are paying on a CPM basis where it could be paying on a CPC basis and I will then earn much more. When I say I am earning less on the CPM ads than what I am earning on the CPC ads I mean by looking at the ecpm of both ads. The CPC ads are showing that my ecpm is something like nearly 4 times as high as what I am earning from my CPM ads when looking at the ecpm.
the object is to get 100% ppc(pay per click) and 0% site-targeted(cpm) ads, by raising the value of your pages to the point where the cpm ads don't pay enuf to compete with the normal adsense ppc. publishers only have two ways of doing that(?): 1)optimize the page ctr, as you mentioned 2)put the mfa's and trash ads in the filter sometimes you even have to remove all the ads from the lowest-performing pages, because they will drag down the value of the site they are on, and maybe even the value of your entire account. once you've tried all that, it's a question of whether or not the sector you are in is a good match for ppc advertisers.
let me clarify that, as i understand it... since google will always make more with ppc instead of cpm, they don't want to serve up cpm unless they have to... both google and the publisher get paid less for cpm, but it's a lot cheaper for the advertiser. so i guess that you could make a penny or less per click by blocking site-targeting, but why not use it as a tool for optimization instead?
I have had them blocked now. I appologise to anybody who was advertising on my sites via CPM using Adwords. How I have looked at the situation from my stats is that I was loosing alot of money from CPM. My ecpm was much lower for CPM ads than what I was getting for CPC ads showing on the site and I was getting site targeted ads showing up amongst CPC ads anyway. They are now all CPC ads. Hopefully my revenue will improve now and even if it does stay the same I still would prefer it this way as when Adsense came out with the program I then adapted my site so that it could includes these ads. I didn't adapt it for the large site targeted ads and I didn't really want to adapt my sites to them as it took long enough to do it the first time than to have to do it again. I want to grow and get content on my sites and not have to keep on messing around with my sites layout just because of new and different ad types and looks. So far things are looking OK with my earnings, but it is to early to tell if I have made the right choice or not. I have thought hard about this for a few months now so I didn't just jump in and do it straight away. If it doesn't work in my favour then I can have them turned on again. Also some people say that you have to optimize the ads so that you get the high paying keywords to show up. How I see it is you can't have it always. I don't want to mess with my sites keywords to show high paying keywords as my sites are optimized for the major search engines.
I'd only consider these if the pay out rate was way higher than the normal AdSense, like $4 or something. Its a lot more work for the user.