Currently, on the "Wallet" page, you can see "Saved Payment Methods" (with an 's') which implies plural. However, it only allows you to save a single payment method.

I would like to use a different credit card for my renewing subscriptions (eg: turbo) from when I buy bits or gifted subs (it's due to having different cash back policies on both cards regarding pre-authorized payments).

I would be fine having only 1 card saved for my reccuring payments, and auto-filling my other card every time I make a one-time purchase, but it doesn't work that way and the one-time payment card information will replace the saved one.

Either allow us to save multiple payment methods, and select one to be the "default" one for reccuring payments (which is what 99% of other websites are doing), or give us the option to use a card for a one-time payment without saving the information.