Also my plat ambassador status still remains, although should have been downgraded to Gold (less than 40 nights). I'm not complaining though.

While still some inconsistency, at least in Asia was upgraded nearly every time. Even HIX in HK was proving welcome drink set + free oreos. Interesting enough, recently I wasn't upgraded in IC KL (fully paid) and IC HK stanford (wkend voucher) even my ambassador status is valid until summer 2015. Unless the upgrade was from 4th floor to 5th floor or something similar..