I think it's only going to work in specific cases where policy or regulation demand. Note the examples: Airlines, telecommunications companies, parking tickets.

I think it's only going to work in specific cases where policy or regulation demand. Note the examples: Airlines, telecommunications companies, parking tickets. Either heavily regulated industries or the government itself. Amazon and the shipping companies aren't, but I fully expect that if this sort of thing becomes a major cost, they'll simply adjust their policies to eliminate it. Amazon doesn't have to offer a refund for a later price drop the way that airlines have to compensate you if your flight is sufficiently delayed. Is there any indication that this will extend to general companies? I'm guessing that there aren't legislated consumer rights in most industries.