Funny, I literally walked into a retail store with that URL saved as favorite knowing the rep would deny they can do jump on demand and sure enougfh she denied they could so it. Showed her the website and she still said they can't allow it. I asked her politely if the the reason she is denying jump on demand is because she doesn't get paid and she slightly changed her tune a bit and said they could look further into my account to see if had a "flag" to allow jump on demand if I wanted to trade in the phone today. I didn't pursue it because I wasn't ready to make a trade in then and there (awaiting Samsung S8).
Lesson learned for me: do not go to the retail to try to renew or trade in with jump on demand. I will be doing this online or over the phone with T mobile. It's shame their retail stores are either uneducated or being misleading to customers.