We are having this discussion continually since 2006. It was Amazon who, despite repeated promises that "they know it is a crucial issue for their customers and that they are working on this", ultimately refused to implement the hard cap on spending. Instead, they added a million features including alarms that basically warn you once it might be far too late, especially if you are not checking your mail every minute in the night. The other big public cloud providers followed their suit.

So the unwritten ritual is when you make a mistake that makes you bankrupt for life is to beg, pray, and hope for their mercy.