Correct. And the charge might be for multiple items, plus a shipping charge, plus taxes and regulatory fees, so it seems unlikely Chase would be able to go from charge amount -> product purchased even if they had all the current prices of amazon products.

Unless JPMorgan gets the info from Amazon (in a post-Bezos company, where the customer-oriented Leadership Principle gets noticeably less emphasis).

Also, I was thinking, if this particular news story happens to get promoted widely, then some of the Amazon card goodwill will be lost (because not all consumers realize that pretty much every company is quietly violating their privacy, but this one happens to be in the news).

Not sure what you mean. The question is about using Amazon-branded cards in regular stores, not just Amazon.