It is hard for me to link to just one thread with discussion on how it appears Google is paying less and less this month to their AdSense publishers. But there is one huge WebmasterWorld thread with pages and pages of posts, starting in the middle of this month and still containing a lot of steam with upset publishers.
Overall, many publishers have noticed a drop in earnings reported throughout the month by Google AdSense. There are dozens of other threads with similar complaints across forums and sites.
Some publishers have said their earnings are flat or up from the previous month but most are reporting a drop in earnings.
I figured I do my own poll and see what the Search Engine Roundtable readers are noticing:
Forum discussion at WebmasterWorld.
