https://www.cnbc.com/2019/04/10/amazon-exec-tells-employees-that-go-stores-will-start-accepting-cash.html

Amazon Go stores, which let customers buy items without waiting in checkout lines, will start accepting cash, amid intensifying criticism that the company is discriminating against the unbanked.

In an internal all-hands meeting last month, Steve Kessel, Amazon's senior vice president of physical stores, told employees that the company plans "additional payment mechanisms" at its Go stores. Kessel was responding to a question about how Amazon plans to address "discrimination and elitism" at the cashierless stores, which charge purchases using an app connected to a bank or credit card.