Some of the biggest players have built systems specifically for cash users:
You can go to participating retailers (like 7-Eleven or CVS), show a barcode on your phone, and hand the cashier cash. That money is instantly credited to your Amazon balance. how to buy stuff online without a card
This is the simplest "analog-to-digital" bridge. You can walk into a grocery store or pharmacy with physical cash and buy gift cards for specific retailers like . Some of the biggest players have built systems