The crazy thing is, this obvious (to anyone experienced in business, at least) danger must be costing AWS money. I personally know of small businesses who have

The crazy thing is, this obvious (to anyone experienced in business, at least) danger must be costing AWS money. I personally know of small businesses who have entirely avoided AWS even though it might have been a good fit for their needs in most respects, entirely because of concerns about the opacity of the billing and the inability to add safeguards in case something goes wrong. Some of those businesses are no longer small, either. AWS does have a reputation, at least among those more familiar with cloud services, for being reasonable about unexpected charges and probably putting something right if it was obviously not intended. But in that case, they aren't even pulling some sort of dark pattern scam to make more money here, and the lack of last resort safety features makes even less sense...