Thanks Ninja...I had seen others checking in with the Prestige cards and wondered how they could be obtained....I just applied at:
http://www.themallgroup.com/prestige/TheMall/index.html
This explains your boyfriend's discount:
Application Conditions
Annual Fee 50 baht for cardholder with expired card.
Annual Fee 100 baht for new cardholder.
Card replacement fee 100 baht in case of card damage or lost.