<< the annual fee is probably hundreds of dollars a year.. i just got some pre approved corporate platinum card offer from somebody and it had all sorts of cool features like the concierge and travel planning and stuff then i saw the annual fee...$300..haha >>
I doubt there is a fee on it. Amex gets money from the merchants accepting the cards and if you are spending $150,000 plus a year on one card then they are making a lot in merchant fees because of you.