So I tried to purchase a lounge membership yesterday at Sea-Tac using my Amex. I wanted to split it over 2 cards (Platinum and Hilton Aspire) but apparently they don't let you do this anymore. (I know they used to.) They just switched over to a new system a few days ago that won't let you split the charge over two different cards. I emailed them but no answer yet. Online won't let you do it over 2 cards either. Does anyone know of a way to split the AS Board Membership into 2 credit cards?