????? ??? purchase ? ??? ?? ??? ?????? ???? ??????. ???? ??? discount? ?? ?? ????? gift card? ???? ??? ???? ????. ?? cultural gift card? ??? cultural content? ??? ? ? ?? ?? ??? ????, micro-payment ??? ?? ??? ??? ? ???? ? ???? ?????? ??? discount ??? ???? ???? ???? ??, micro-payment ??? ?? ? ?? ??? ?