If you mean SCB AsiaMiles WorldMaster then the wiki says yes at 1 AM per $6, and the master of the Wiki (percysmith) is almost never wrong! I'd certainly trust him over random SCB counter staff.
The
T&Cs seem to confirm this (by the absence of AAVS in the exclusions).
And as an aside I notice that their definition of "Overseas transaction" (for $4=1AM) is simply "Transactions posted to the Card account in a currency other than Hong Kong Dollars." I can see situations in which that might be quite handy (years ago when Citi had such a definition I got rather large numbers of miles on some USD payments made in HK).