They free credits for new accounts only. People do tend to try to abuse them though by opening a lot of new accounts and trying to use a voucher for each one. It's like free clicks to start.
Hmm.. I see so they are in teh form of codes. But, let's suppose I already have an account. I buy a voucher and open another account. I'm asked for $5 activation fee and I have to charge my CC. I will be easily caught then How do people trick google then?
Thanks for the reply johnson But what's a virtual credit card where to find them? And does google allow to advertise one domain on multiple accounts?
Cashyourdollar.com is the one that i know selling VCC for adwords. And Google allowed you to promote more than you want to advertise. No limit! Anyway, i suggest you need to look at this page... than see one and another thing for use adwords for your bussines . regards