I am an A/V and Home Automation dealer. We have sold hundreds of Sonos systems and integrated them with Control4 Automation systems. A recent change to your API has removed the full featured integration that allowed Spotify to be navigated via Control4 touchscreens and on screen GUIs. This has absolutely been devestating to my many clients and how they use their systems. A premium subscription was required for this to operate which represents alot of revenue for Spotify. I will be sending out an email to all my clients recommending  them cancel their subscriptions and switch to a more integrator friendly service, such as Deezer, Tidal, or others. I am not sure what drove this decision, but it was not well thought out. I have already cancelled my subscription.