You simply add your prepaid card to PayPal and should be able to donate through their service. I haven't used a prepaid card with PayPal before so I don't know how difficult that will be but you should be able to find more information via internet searches. As far as I know, it's the same thing as adding a new debit/credit card to your PayPal account.
It's the exact same as using an actual credit/debit card. PayPal cannot tell the difference between prepaid and the real deal. Donating with a prepaid card should be no issue. Thanks for supporting the server, folks! Wish I could do so myself, currently poor.
I don't have the card with me atm, but as far as I know, don't I have to verify my account with a credit card or bank account to make transactions online? Or can I verify my account with prepaid cards?
I've never actually added them to an account, I've only used them as a guest, so I'm not positive about that one. Edit: Taken from PayPal's website (from 2012): It seems you aren't actually able to add them to your account - apologies if I was misleading above, I was going under the pretense that you'd be using it as a guest, but I now realize that's not possible when donating to Maple Royals.
Oh, if this worked, I could've sold some items in steam on a trading website and donated with the money gained from tht.