I have a small pile of gift cards with roughly-negligible (~$1) balances left on them that I would like to put to some use. I notice that fly.io has a prepaid credit system, but It seems like the minimum amount of credits that can be purchased is $25. I intend to mostly stay within free tier limits until my app requires scaling beyond that and would like to have a small ($1-2) buffer of credits before (presumably) my credit card will be auto-charged.
I tried setting up this gift card as the card on my account but it was not accepted - probably because it is a gift card. Is there a way I can empty the remaining balance of this card into my fly.io account so it doesnt go to waste?