It sounds as if American Express had excellent information, perhaps more insight into your financial circumstances than you expected. Still, I wouldn't be surprised if they modify the decision and keep an account open with a sharply reduced credit line, because it also sounds as if you are acting responsibly.
yea, im crossing my fingers for that outcome, i dont use the card quite as much as i used to, but really would like the cards to remain open so i can use the spend threshold to make my Delta MQD waiver.