Originally Posted by
fakecd
so the bottomline to me is (1) qualification to higher tier is a lot more strict than retaining existing status (2) rate of accumulation is a different formula. (3) higher cabin fares definitely help increase your flexibility for qualification to higher tier in terms of extra-time to make it up.
You might be on to something. One of the Economy fare ticket I bought was B-fare, the other two are K-fare, and after that I got promoted to GO.