A subscription service offers certain content in exchange for a periodic recurring fee (subscription). However, if the user stops paying the subscription, the content may be no longer available. The subscription model is used by Spotify, Apple Music and other digital streaming services offering music on-demand over the Internet.

Practicing And Performing Music
There is a perception that performing and practicing music are two very different activities. I think that the relationship between performing and practicing is deeply intertwined and at a certain level the distinction between the two virtually disappears.