Paypal please! (or Riot :P)

[Vespar]

Again though, It's not like it has to go through Paypal directly. They were able to use UltimatePay for quite a while before they shut down. Its not like they cant go through another 3rd party that would offer that support.
Another option they could do is instead of Game Time Cards they could make "CRYSTA" cards. Crysta is usable for subs and cash shop items. Or come up with a simple method to convert a game time card to crysta currency and keep the current game time cards available.

They could easily offer Crysta digitally through the NA Square Enix store. Since the store accepts paypal through Digital River this would not be hard to accomplish. Then just enter the "code" as one would a gametime code or what have you, but instead of time, it would give you an amount of crysta.