It does, in a sense. From what I understand, you have to use PayPal to pay for something called 'Crysta' which is kind of like Square Enix's version of Microsoft Points on Xbox Live, which you then use to pay for your subscription. As far as I know you can't use PayPal to directly pay for your subscription fees - although there are other options for subscription, such as prepaid cards/time cards, and credit card/debit cards.