I have a T-MOB009, S-off, unlocked and just checked after reading this thread that I have the 100GB since May, without doing anything. It will expire after 2 years.
Didn't noticed it yet because I am using dropbox and have 50GB extra from Samsung GS4, but they will expire in November.
Private Collection: HTC Trinity + Kaiser + Diamond + Shift
+ HD + HD2 (WM6.5, Android 2.3.3 MccMBoxmax v6.1), HTC Wildfire S, Motorola Xoom 3G, RAZR, Samsung Galaxy Note, Samsung Galaxy Tab 7.7, Samsung Galaxy S4
In use: Note 2, Note 10.1 2014, HTC One (M8)