7_Driver - 9:44 am on Sep 4, 2012 (gmt 0)
If you don't like interest-based ads appearing on your site, you can try turning them off.
(Or at least you could a few months ago, because I did).
I found that EPC fell slightly, and CTR didn't change - so my EPM ended up lower.
I was surprised by that result - but that's why it's worth testing.