This is not the annual fee for the new card, this is related to the separate annual fee for enrolling your Corporate card in Membership Rewards. It sounds as if they are giving you a pro-rated refund on that fee because your Corporate Green card is now linked to a personal Platinum card.
The fee used to be $75. Discussion here:
http://www.flyertalk.com/forum/ameri...rate-card.html
Ok - so that may make a little sense as far as the $52.50 credit goes - but what about the $90 fee on the new Platinum, and the lack of the $450 fee on the platinum?
Thanks!