Made the call today, said cancel at the prompt, and got connected to 'customer loyalty.' Never said cancel with the rep. Started with the bill has gotten too high spiel and if they had anything they could offer me. As she started searching, i casually mentioned i'm also interested in ST. Ended up getting Max for free and a $10 credit for 12 months, $498 in savings. Initially only offered regular ST for free and i declined max - but when she put it in, system automatically offered me the max upgrade for free. Thought i was off contract already but apparently i have about a week left. She said to call back as more discounts might pop up in the system at that point. All in all, the call took about 30 mins.
As always thanks all for relating your experiences. Very helpful to know the climate when engaging with them.