I thought I've read that they've started accepting Apple Pay (and maybe Google Wallet), but that is the only ones I've heard about. I didn't ask in October, but I didn't see any signs indicating that PayPal was an accepted form of payment (credit cards, cash, Disney gift cards, and magic bands were the ones that I recall seeing most commonly).
Are you asking about the PayPal Extras credit card from MasterCard? That should be fine throughout WDW because it's a MasterCard.