It may say that on the website but it's not listed anywhere in my leasing agreement. In fact, the agreement I "signed" stipulates the lease payment, terms and payoff amounts. Everything is very clearly defined in black ink.

I believe they are referring to your next upgrade. In no way are they guaranteeing the price of your upgrade nor are they guaranteeing that there will be any available upgrades at all (in other words, we can cancel the program).