nippi - 4:57 am on Aug 12, 2010 (gmt 0)
None of this is of much use, unless you are comparing ctr and ecpm.
Sure, if you added 10 new sites of great content and got great google coverage on them... your earnings are up.
only relevant information here is is your ctr epcm up/down?
April was great, May June, July, august sofar... 30% down, on the same traffic.