We have bought every game with a different e-card an no problems so far. This means at least 500 different cards. E-cards was a service where you could create a

We have bought every game with a different e-card an no problems so far. This means at least 500 different cards. E-cards was a service where you could create a credit card with a fixed amount of money on for each buy, limiting the risk involved in giving out your card details on the net. Sadly they shut it down recently.