I just went through this today. I called to cancel and received the following offers:
Offer 1: $25 for 5 months
Offer 2: $99 for 1 year (in the hope that I'm bad at math)
Offer 3: half of offer 2, $49.50 for 6 months
Offer 4: back to offer 1
I did end up renewing. They were very clear that there would be an automatic renewal and gave the amount that I would be charged every 3 months once my current deal ends.
I did put the expiration date for the current deal on my calendar. FYI, they charge your credit card on the day your deal .