purplecape - 6:17 pm on Jul 24, 2010 (gmt 0)
I don't understand how your eCPM could be holding up, with traffic up, and yet earnings are down. eCPM is how much you earn per thousand impressions. If it's holding steady, more traffic should equal more earnings.
But if your earnings are down, then I assume your average click is earning you less than it used to be, yes? That could be smart-pricing, it could be the economy, it could be changes in what advertisers in your niche are doing.