My free new car subscription is up in 2 days, I just got a text message on my phone I can have 3 months free then be charged the 4th month at whatever the current price will be. I got the offer in an email after my subscription expired in October. I would gladly do 36 months.
They did this to my Aunt. If you do not, your subscription plan will renew at current price probably more than you are willing to pay. They never figured it out. I bought a Car in June and I am still on my 3 month trial.
If you forget to cancel and see the charge on your credit card, just call and they will apply it to your next negotiated rate. If they won't provide you with a savings, cancel the service and wait for the new offers to come in the mail. Yes, they will very aggressively try to win you back when you leave.