chrisdonahue - 8:24 pm on Jan 6, 2011 (gmt 0)
I really have to believe that this is a software fluke on their end, which we will never hear about. It may effect some sites but not all, imagine how many data caching servers they must have to administrate the adsense and adwords program. If something goes wrong along the way, both the advertiser is at a loss as well as the publisher. If we're seeing "overnight" changes in performance, and our traffic is constant, either 1) advertisers are legitimately bidding less for the keywords our sites use, or 2) there is a significant problem within the G infrastructure which we will never hear about but will be resolved without us even knowing.
I have to admit its strange, we still haven't fully recovered, but like many here, we rely on advertising sources such as G as our primary incomes for ourselves and our families.
So I guess it would be nice to hear that G erred somewhere, but that's unlikely.
Today: fluctuating CPC is the name of the game, one second it will be what I have calculated as my baseline average CPC over the past five years, the next, down 50%.