When canceling any subscription service the company usually sends you to a 'customer retention specialist'. It is that person's job to make whatever deals necessary to keep you as a customer. If not interested, just say no.
I started with XM monthly, then went to a five year plan, then to a lifetime plan. I use a portable radio and can transfer the subscription. A lifetime subscription on a vehicle radio cannot be transferred.
Most people aren't aware that around most national holidays, all radio subscriptions are free for two weeks. Turn the radio on and try it around holidays.