Or maybe there's a kiosk where you can fund your account with cash? I can imagine a bunch of ways to both accept cash and also have the Go concept. But I don't know, I don't live in Seattle and haven't ever been to a Go store.

Edit: Someone else posted this link[0] elsewhere. The stores are in SF & NYC which both have laws against cashless stores. So, contrary to your reply, the following is actually false:

(Presence of Amazon Go store) ⇒ (City doesn't have a ban on cashless stores)

[0]https://www.businessinsider.com/how-to-pay-cash-amazon-go-sa...