Who I have the same questioned this solution

I just spoke with Verizon about the trade-in for the iPhone 7. I have an iPhone 6S plus that is paid for. The trade-in value of $650 is only good if you sign up for their edge program for 2 years, which I would NOT recommend doing. I did that when I bought my iPhone 6. 1 year into my edge program, the balance I owed on my phone was considerably higher than it should have been and nobody could explain why. I wanted to use their current program and get the 7 plus and pay the difference out of pocket, but they won't do it. If I won't sign up for the edge program they will only give me $290 for my 6S plus that I paid over $800 for a year ago. This makes no sense. If the program allows $650 for the trade-in and the iPhone 7 plus costs $750, why does it matter if I pay $100 up front or stretch it out over 2 years unless Verizon is somehow screwing the customer for more money than the phone is worth?! I wouldn't recommend upgrading and using their edge program unless you really need to.