first google closes me with a low excuse, now yahoo kicks me out with this (after few good months): " We regret that the Yahoo! Publisher Network beta does not currently support publishers whose primary audience is located outside the United States. As a result, we've had to terminate your YPN beta account for breach of the YPN Terms and Conditions."
OK, ther TOS refers to the fact that they do not accept outside US visitors, but tell me a website that it`s not worldwide. And some other thing that i found in TOS is that you don`t have the right ot filter their ads. How am i suppose to show ads only to US if i`m not allowed to show ads only to filtered US visitors?
Maybe Google and Yahoo don't like your traffic. Google has been known to boot people out of their program because of low-quality traffic. And Yahoo has also booted people for excessive international traffic.
Guess you'll just have to wait until Microsoft releases their ad program.