Ok, i never used adwords, so i am not sure how can i get those cheap vouchers. But i think you need virtual credit card to register new adwords acc so you can use vouchers. So vcc + cost of voucher = no more then around $15 And you get around at least $50 to promte. So if i promote my site with adsense (and of course some unique content) could i earn around $40 (minus $15 for voucher) ? I am guessing that only thing that can stop me from doing this is google policy that don't accept multiply adwords account ? Of course i don't think about adwords arbitrage, that can be done, but require some experience. Tell me where can i fail doing this ?