CCB - yes. Base rate is very tame $15/mile rate but they do regular promotion
A 939 promotion is a play on their stock code 0939.HK - you get two times extra miles up to a certain threshhold and 8.39 times extra miles after that up to 5,000 extra miles per card per month.
Every time they release one we have to calculate the "magic number" of achieving the 5,000 extra miles (this time: $15,400 for most people). They have two Platinum Visa, one Titanium (soon to be Platinum) MasterCard available for application and the limit applies to each card individually.