NomadMan - 10:35 am on Aug 19, 2012 (gmt 0)

Does anyone have a theory as to why we are all seeing such dramatic drops in CTR and revenue?

More and more advertisement space combined with IBA. Dilutes the revenue per site / niche to dramatic lows.

2012 Adsense revenue goes up to record heights....

July is blow average, after-all it's holiday season. CTR dropped to 0.8.