Pogo forum is here
If you're looking to join Club Pogo, you may not be able to use a prepaid card; check this FAQ :
ATTENTION: In some cases we may not be able to process your pre-paid debit card as the transaction may be rejected by your card issuer. Certain pre-paid card types restrict digital or online transactions. Please check with the card issuer or try another payment method.
I think the bottom line is that many times a prepaid card can't be used for a subscription fee. Try it - if it doesn't go through or if you want more info, I would suggest you contact EA support via this link