I received the invitation from Amex HK this morning. Do not know what to do with it too since I am already a DM.
Now I have some doubts on whether this is a targeted promotion for skyhigh spending Centurion members only. My annual spending on the black card is really not very high to warrant an invitation I suppose. I hardly buy CX/KA tickets with the black card too, I usually credit them to Amex CX card for the miles
