Yes, because without them knowing where your infrastructure can be killed/what can be deleted in order to reduce costs without completely destroying your business there's no way for AWS to do this for you.
> without them knowing where your infrastructure can be killed/what
So add an interface that will let you specify that somehow for common scenarios? There must be something better than zero help they can offer. Not everyone needs something that can autoscale to Google levels.
I think the idea is that they do help you. They provide alerts and and APIs that can be used to programmatically control all of your infrastructure. So in a sense having a Lambda listen for billing events and respond in a way appropriate to your particular organization may be pretty close to the best solution.
I'm sure at some point, but at that point you're no longer really their customer and I'm sure they're less worried about not completely destroying your work or livelihood.
I've actually had my payments on my personal account bounce once or twice and no, they did not.
