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.

The Evolution Of The Electric Guitar
The first electric guitars were made in the 1930’s in response to a demand from guitarists in bands whose rhythmic stylings could not be heard above the other instruments.