A few decades ago fitness gyms would offer lifetime memberships, then go out of business, so a law was passed limiting memberships to 3 years. If you are buying a service or software that is unlimited for any price, BEWARE! Any responsible company will limit their offering between 1 to 3 years, because many companies don't survive beyond 5 years. With a subscription offering for software updates or service, companies can live long, and continue to serve their customers.