netmeg - 7:05 pm on Jul 19, 2013 (gmt 0)
You need to read up on smart pricing.
If your site gets nothing but low earnings per click, then you need to find a way attract better traffic.
Google wants traffic that is good for their advertisers - i.e. who convert, who buy things. Because then the advertisers spend more with Google.
If Google doesn't think your traffic is likely to convert (and they have tons and tons of data to do their predictions with) then you may find yourself smart priced.