It shouldnt mean shutting down all your services, it should mean not letting you provision new ones and limiting the scope of what you can continue doing.
If you have a lambda set up that normally runs a hundred times a day, and suddenly it tries to spin up 10 million instances, it should block that unless you specifically enable it.
This isn’t a limit I’m setting at some percentage above expected costs, it’s: “I don’t want to take out a HELOC if something goes wrong”
For these users, the article’s €54k bill would be replaced with their business data getting wiped out.