Who told you so? I just called AMEX travel and enquired about the $200 credit and was told I must use it (a) only for international flights and (b) I would be charged a fee of $55 per person ! I was planning to book a return flight to the USA for myself and my partner and suddenly my $200 turns into a $90 credit... doh!
It was the travel section. Have pmd you some details. Mind you I haven't booked anything.