Publishers writing in the Adsense forum (we're on to six pages of discussions in one thread alone) have noticed sudden, unprecedented steep drops of 30-50% in the last few weeks, and we want to know if there is a comparable drop in ad prices for the Advertisers.
We'd like to know if Google is taking a bigger piece of the pie or if the data we see is a stat reporting glitch. The big revenue cuts occurred around the same time as Adsense channels experienced their first glitch. Have you seen any reporting discrepancies in your AdWords data, too?
p/g
When it was at 48 million I experienced what you describe and my site was kicked back to page 7 of the results. Now that its down to 11 million and the site is back to the bottom of the first page/top of the second page and the values are back to normal.
Stuff like this makes me think that my site rank plays heavily in the payout. I rank well vs 11 million, not so well vs 48 million. CTR and bounce rate play a role on getting full value for sure.