Yes, I think it is vital to understand which subscriptions people are willing to pay for. People are most willing to pay for things where they understand that

Yes, I think it is vital to understand which subscriptions people are willing to pay for. People are most willing to pay for things where they understand that there is an underlying cost to providing the service, and where they derive value from updates or ongoing service. The service should also be provided at a competitive price - for example you cannot charge for navigation in most cases because people can use free nav services (Google Maps etc)