deanw - 7:22 pm on Oct 9, 2013 (gmt 0)
There may be hope. On July 1st my CTR dropped suddenly and dramatically and then on September 20 my CTR and CPC suddenly rose well above my July 1st levels. I'm keeping my fingers crossed that this will stick.
It seems like Google is testing different algorithms on certain publishers, maybe for a future update for all publishers.