The GM's are looking into other options of 'payment' for users that do not have a creditcard, paypal account or money at all. Stay tuned for more on that.
http://www.splashplastic.com/
That is a good way if you dont have a credit/debit card
.my used this when i was about 14/15
basically you send off for a card and you go to your local newsagents and tell them how much cash you wanna put on the card e.g 10 euro and then you will have 10 euro on that card to spend
kinda handy for people who dont have cards or their parents wont let them use their cc/dc