Blackmail or Coercion makes no difference. The store was willing to do the upgrade with those conditions. Highly illegal if not totally unethical.
The change date well that got me too. But its not that long a wait for the OP.
That is why I love no contracts, and pay full price. I can get phones when ever I please as much as I please.
May buy my wife the HTC One since she likes mine. Maybe port her over to T-Mobile as the spare line or stay on Verizon
its up to her.