Not sure if you could say they "make" you do anything. However, you are offered a new contract to sign during or before the upgrade process. Mine came before and some have come during. I guess if you didn't sign it then maybe they would just stop the upgrade process. I mean, after all, why would they waste their time on you if you don't intend to stay for any meaningful length of time? But I do believe you can sign a 3 or 5 year contract when you renew.