The one with Zeros normally get 4-7 cpm...this week is turning out to be a disaster...is it just me? thats just 1 hr report for 2day..but this is happening for the past 3-4 days and the earnings have dropped by at least 150%
Dont get confused with ctr and cpm. Cpm is just a measure of overall earnings and is bound to fluctuate over time. If ctr is down, you should really work hard to get back higher ctr.
Last month my ctr was down, but now I think it is coming back. I did change some adv. around. Look. It could that your site is getting some repeat visitors now who are interested in your content, and not the ads. If you rely on adsense, try changing your ad placement/color/etc. once in awhile to see if it matters.