Comment by jve

I aim to make the product convenient and as straightforward as possible. It's better to extend its use when needed than to worry about when to stop.

Sure it is. A subscription's defining trait is continuity of access contingent on periodic renewal, whether manual or automatic. People subscribed to things way before online payments or even credit cards were common. A modern, if niche, example is Tarsnap.com. Once in a while, I get an email from Colin telling me to pay up if I don't want my backups deleted.