So I have a strange question, i know for my amex plat if you want to make an unusually large purchase you can call and they can clear it for you. but what if you want to make a large purchase on a amex credit card (Delta Reserve card) can you call and pre-pay for it? like i want to make the $60k spend on the card to get the bonus MQMs before the year is out. however to do that id have to spend more then my credit limit...Could i have amex take the amount i wish to charge out of my bank, so that i may charge that much at one time?