I've had about a 300-600% drop in revenue across all of my ad networks in the past 2 months, including adsense, even though my traffic has gone up 50%.
Well my earnings have increased, I guess it will depend on what ads your site will show. Whilst some industries will be cutting back on marketing others will be taking full advantage if they are in a good position and so will shell out more and hence us publishers will get more.
I am making around 100 to 200$ per day. But now making only 30-50$ Can't believe the paying rates nowadays.
Whats your experience ?
Did your traffic also dropped? Did you keep updating the content of your site? You need to maintain your traffic and if possible try to get more traffic. More traffic = more clicks.