avalon37 - 9:09 pm on Mar 28, 2013 (gmt 0)
I'm curious about this as well. On a site I manage there is a 728x90 at the top of the page, a tiny 234x60 text ad in the middle of the page, and another 728x90 lower on the page.
The 234x60 has a terrible CTR and earns very little extra money, but a larger ad would not fit where I have it. My question is do you believe the extremely low CTR is hurting my earnings from the other ads on this page?
An AdSense rep explained to me that the top ad on pages typically are highest possible payout. The second ad should payout the 2nd best, and so on. I get a lot of clicks on this page from the 3rd ad on the page...but is the poor performance from the 2nd ad reducing the potential RPM of the 3rd ad?
I guess I should just pull the under-performing ad and find out.