My prefered way to make game purchases is via physical gift cards
(scratch cards) that I buy at various stores to add funds to a virtual
wallet that most virtual stores offer. So far I have been able to make
use of google play cards, steam gift cards...
Vote on his and it could potentially become a future
featurehttps://oculus.uservoice.com/forums/921937-oculus-quest/suggestions/37695331-more-payment-methods-and-features-gift-card-etc