PM if you have the solution. This is a quote from some other forum, but I have the same problem: " I bought and used about 100 vouchers from an indian guy who sell them cheap, they always worked for 5 sites of mine... until now. Now those sites have been banned by adwords and even if I'm using other domain names redirecting towards my sites (after adwords have approved the ads) adwords keep banning them. I think of a few reasons : - they banned my IP (never used proxies but it is useless with adwords they immediately know it) - the vouchers I used to buy no longer work in another country - the billing infos I used (always real ones) : adwords team have understood the trick... - I always bought $100 vouchers and I used the credit in 2 days : maybe adwords think it's not a normal behaviour for someone who is testing their service... Well good luck guys, it's bad because adwords vouchers method brought me some good cash and now I have to go with bing or facebook, which convert less... "
When you say vouchers, do you mean the free coupon codes they send you in the mail to try their ad service? You are only allowed to use those once, they are for 'new customers' only... It seems like you're doing a lot to try to trick the system. I don't think this is a blackhat forum..