> There is a delay of up to a few days between incurring costs and receiving budget notifications. Due to usage latency from the time that a resource is used to the time that the activity is billed, you might incur additional costs for usage that hasn't arrived at the time that all services are stopped. Following the steps in this capping example is not a guarantee that you will not spend more than your budget.

This looks like it has the same problems as the post, because it also relies on those budget alerts that can happen a long while after you've exceeded them.