Yes, this works :-)
You went down the "too much documents are better then too little" road, I didn't send any passport info or flight journal to TK. Seems that they updated/changed their T&C, they offered validity until 3/16 or 3/17 depending on the validity of the matched FFP, but you got 10/17
BTW I already renewed TK until 2019
- not a big deal if one flies them longhaul C once or twice.
(and if one has a top tier hotel card, this is/was the time to get some more at Hilton and Hyatt
)