it's such a good business model, provided you can trust people not to steal

effectively 0 overhead and people can go there whenever they want, everyone wins except big companies, which means everyone else wins EVEN MORE

here in sweden we have an app called Swish which makes it trivially easy for anyone with a smartphone to send money to anyone else, so these places will just have a sign with their QR code that you scan and it automatically inputs their account number and the cost of the item. I want to live in a world where this is the standard way to sell things.