Originally Posted by HawkeyeFlyer

LOL, I assure you that your Amex Plat DOES have a limit. While I understand your thinking and the wording, "no pre set spending limit" I promise you there is a point they would shut you down or not approve a charge.
These cards also have means now to track your spending and credit usage in virtually real time. If you go from $0 balance to $100k overnight and try accessing that remaining $115k to "bustout" you may be shocked to find stuff getting declined.