You are aware that if you were legitimately billed for overages that you didn't catch, you are still liable for them, even if your cards refuse the transaction with insufficient funds, correct?
But I still don't read all the fine print and start getting charged. It hits 100$ and my limit is 100$. Amazon starts complaining.
I guess I'm hoping a low limit would cause Amazon to start complaining and throttle/restrict.
Yes it's not perfect, it would be better to tell Amazon to never bill and not let me use anything that costs money. Which they won't do, for revenue enhancement reasons.