Interesting thread...

21 here, "intermediate."
I've taken advantage of one mistake rate - that of the HI HKT THB1 rate. Directed friends to other mistakes.
I've recently planned and booked my own DONE out of a cheapo foreign country and have arranged similar for friends.
Status-wise, fairly mid tier but I get by.
Been op upped a few times, including once on anti op-up fortress SQ.
Always get good upgrades as a lowly SPG Gold but I think that's more luck than anything else.

And today I managed to help a friend book a cheapo fare on an airline I've never dealt directly with myself, MH C ex-CMB and managed to get the ticket issued in the MEL office...

And often the target of "The line for economy is over there, sir!" ...

Deffo many experts on FT, but I feel like an expert amongst my novice friends...