I worked for an insurance company a long time ago. We sold insurance for 1, 2 or 3 years, and each year we would prompt the user to extend.
At some point we changed to a yearly subscription that you could cancel at any time and even get a prorated refund. This made us substantially more money because far more people would forget to cancel their subscription than there were people committing or extending to 3 year insurance. So the number of users reaching the max of 3 years increased.