bitrefill the mastercard works over vpn which is nice. but i found the prepaid debit cards pretty hard to use without a lot of info given away

in general gift cards like a safeway or kroger card can be bought and used by just presenting the qr at checkout, so works pretty similar to cash. this is the bulk of where i spend, easy to just keep a couple large ones on rotation, and you dont end up with any dust too as you roll from one to the other at checkout which is nice.

i just posted on this but etsy works real well as you can buy a giftcard, make acct, redeem card, buy the item as a gift and be prety private ( especially if you send the gift to a friends house under a nym).