We are using CBSubs for an actual product subscription (not online access) - Weekly organic food delivery. As you can imagine, it would be terrible if someone's food sat on their porch for a week or two while they were on vacation.
I realize this component was built for online subscriptions, but it is working pretty good so far for a physical product. There have just been a few work arounds I've had to implement. If you ever consider making CBSubs for more than just online subscriptions, let me know. I'll be happy to provide you with a handful of ideas based on how we are using it. (That could open the doors to a whole new market for you!)