[Porsche-O-Phile]

I thought the whole reason to have AmEx was because there is no credit limit?

Credit markets are crashing and will continue to for a while. It's becoming "use it or lose it". As things go downhill economically, people depending on their lines of credit to keep solvent are going to get shelled. It's simply a case of the credit lenders trying to cut their losses preemptively. It's a not-so-subtle way of them saying "we think things are going to get REALLY schitty and we don't want to be the ones left holding the empty bag when everyone starts borrowing off their credit lines to stay afloat, then defaults".

They don't trust you. But I wouldn't take it personally - likely they don't really trust ANYONE right now...