I'm opening plenty adwords accounts(I have nice pack of vouchers). And I noticed something weird. I'm opening account, set up test campaign and everything works fine. Add second campaing and sometimes ban and sometimes not. Using this same keywords on this same domain or different domain it doesn't matter. IP, cookies what else? I'm using proxy to get different IP's. Maybe problem is that I have billing adress in one country and I'm conecting thru another? I was thinking that I set my budget, too high. But that isn't it. Or maybe I should run test campaing for couple of days and go back to it?