I received the same thing. And we just signed up for a Calm Lifetime back Friday deal. We use it is. All rooms. Calm on Sonos is our bedtime routine. I don’t want to airplay I want to control it like I do now. I guess I will have to get creative.  

Unfortunately, Sonos has no financial agreement with Calm, merely a distribution agreement. It’s up to Calm if they choose not to maintain the API and servers necessary to support Sonos. It’s certainly a distressing thing, as I’ve been a non-paying member of Calm for years. Which means I may be part of the issue, not paying for the source, albeit it fairly restricted as to what Calm offers.

I hope you’ve expressed your concerns to Calm. Sonos has no part in this decision, if I read the Sonos partners page properly, as well as the Sonos financials. 

This is completely unacceptable... I use this app integration everyday, on multiple speakers. I also just bought a lifetime subscription to Calm, and it was only because it integrated into my Sonos system! Why the hell would they end integration? We need to create an intense pressure campaign to barrage Calm and get them to keep the integration going. 

While I agree, I’ve never seen a rep from Calm here in the Sonos boards.