To block ads to display from visitor from certain IP/country. One of the big traffic from my site come from one of Asian country that Adsense says they wouldn't pay. So there is no point to display them anyway except for trash impression. Thank you,
.htaccess might help. You can also do some simple PHP code to block ads for asian traffic. More sophisticated way is of course, use OpenAds 2.4
On my blog people are visited by worldwide but every month I get only 2 dollor here is not increasment. What is the reason?
use some IP2location application and when the user come from a specific country, you do not show Adsense to him....you show other ads.