>asymmetry of moral expectations and entitlement.

What does morality have anything to do with the market expectation of "When I shop with firm X I want to have a good experience"?

If a consumer has to always second guess whether or not a seller will try to clawback their goods because they miscalculated their asking price, that's a horrible consumer experience. If I want to contract with a firm (say a credit provider such as a credit card network) that will defend me if I signal I'm going to default on a payment because I'm unhappy with a price, the market can sort those needs, desires, actions properly.

I'm pretty sure the free advertising Amazon is getting from this "gaff" (Was it a gaff? was it guerilla marketing?) and the customer loyalty they gain if they provide "When you shop with the Amazon firm you have a great experience" will be worth it.

Markets don't survive because they adhere to a mosaic of subjective beliefs about morality, they survive because people uphold their commitments.