Best answer by jgatie
Is this true, to add a service it needs no input from Sonos? Sounds very different to my understanding.
I didn't say there is no input from Sonos. However, the initial sign up and development is done by the service using the SMAPI (Sonos Music API). Sonos basically does the testing after the service asks to be added and submits their SMAPI integration. See this link for the Sonos Music Partners program, and how a service can sign up and get on Sonos: