Liar!
"Sonos has always collected functional data from its devices. "If you choose to authorize Spotify," a company spokesperson explained in a phone interview with The Register, "we need to share information with Spotify."
If you signon to Spotify with your Spotify userid from a device, there, is absolutely no need for the manufacturer of that device to be aware of your account. Spotify knows you have registered and does not need Sonos to tell it who its customers are, (or Apple or Android or Microsoft who let you use Spotify without insisting that you give up your privacy).
Biting the hand that feeds IT
