High Impressions,High Ctr,low earnings,why?

Hi,
I am using admob banner(Does any one know of a better banner ad network ?which pays better?)
Most of the impressions are from USA

Here are the stats.
https://www.dropbox.com/s/tncf6mrng8pi7b7/Screenshot%202014-10-09%2022.08.08.png?dl=0

Please let me know what I am doing wrong?

Hey @rixxx22 try to combine admob with other formats to boost your revenue. At Pollfish most of our developers use us this way. We have 100% fill rate in the US for the moment.

Please don’t advertise here,