One benefit of the Cathay Pacific American Express card is the 10% off fees charged by Asia Miles for buying, transferring or renewing miles. I can't find this anywhere but would like to know in what situation will it apply. Do I have to be the donor, or can I be the receipient, or even as an unrelated party who is willing to use his card to pay for the transaction? Is this benefit applicable for sup' card holders?

A similar question on buying tickets online at CX.com. If a supplementary card holder uses his card to buy a ticket for himself online. Who gets the online bonus miles?