Hi, sorry if this question was asked before, but I'd like to know if this is possible: I buy few vouchers and then I'll create one GA account after the another, for each of them I can use another bank account. Should I use differents IPs for each GA account? Is there any risk?
From other's real world experience, the email address seems to be their main matching criteria. A friend uses different emails & family names for additional Adword accounts using vouchers with great success. Using the same credit card to pay for ads may not be an issue here. Then you can easily manage them by linking them to your My Client Center account. Google don't seem to mind this as long as you don't abuse the system. That is, only open new Adwords accounts when you really need them for new campaigns or business projects. Not just for the free ad money. Otherwise they may get you and may stop these promotions if they are easily abused.
Or just to be safe, create 25 campaigns for your account and then create a new one. If they question you, you can always say that you have hit the maximum number of campaign, thus you need to open a new one.