System: The following 40 messages were cut out of thread at: http://www.webmasterworld.com/google_adsense/4333699.htm [webmasterworld.com] by incredibill - 12:01 pm on Jul 3, 2011 (PST -8) Something sinister is happening at Google. I can look at the old page, then the new page, and there's a $10 difference. I can look an hour later, both pages are the same, and I've lost $25 of earnings. WTH are they doing at Google?
So there are other factors besides invalid clicks that cause your earnings to be reduced. Google might be going through a problem with advertiser fraud. Maybe some crooks taking advantage of AdWords Postpay options, or perhaps it is outright credit card fraud.
This implies that there could be other reasons to reduce publisher revenue as well.