Adding more one-time payment options for subscribing

It's weird to me how you can make a one-time payment for a subscription using your Steam Wallet and game time cards, yet you're forced to pay for an auto-renewing subscription if you just want to use your card on the Mogstation website. I think this option should be added since I know I myself and many others have forgotten to end auto-renewing subscriptions, such as xbox live, ps+, etc. I know that you could just buy a game time card, but you can't buy those through Mogstation itself and they're only for two months of playtime/$30.