When Amazon came out with the "dash" button and then the "Alexa" speakers, I figured they must have expected they'd get some unintended purchases, and that they'd make more profit from those than they'd lose in the people going through the refund process. (That, or they'd learn whether it was profitable, and eat it as an R&D cost if it turned out to be unprofitable.)

I think this might be similar. In short, it's not consumers who want robots to buy for them, it's producers who want robots to buy from them using consumers dollars.

I think more money comes from offering this value to every online storefront, so long as they pay a fee. "People will accidentally buy your coffee with our cool new robot. Research says only 1% of people will file a return, while 6% of new customers will turn into recurring customers. And we only ask for a 3% cut."