Im at the moment tracking some urls, using Google's Adsense new tracker tool , (pain in the ass if you ask me, if you track a hundred urls,you need to import them manaully, track, view them manaully etc, no click data etc. There is still lots to improve there Google. ) and i have noticed that some clicks of mine got a quite high eCPM but the actual payout delivers no more then three cents. Did the market suddenly collapsed for this particular ad/keyword , is Google taking a large piece of the pie (Smart-pricing-system ) or...?
eCPM is an estimate of how much you'll make per 1,000 views of that adsense channel. If you get 1 view that clicks at .03, then your eCPM is (.03x1,000 = $30). eCPM is a function of your conversion rate and average cost per click. Since you have no control over cost per click (advertisers no longer pay big bucks for your keyword, some days are slow, seasonal bursts, etc), then you simply need to work on your conversion rate to boost eCPM. All the regular stuff including blending your ads, different positioning, rotating colors, etc, will all help that eCPM increase.
Thanks for the reply. I posted the thread and found the solution as well by pressing the question mark behind the eCPM button. Think first and then react.