I think they meant an ad in the Sonos app. After an update of the app, it displayed an ad and discount code for a new Sonos product. I have had Sonos since 2017

I think they meant an ad in the Sonos app. After an update of the app, it displayed an ad and discount code for a new Sonos product. I have had Sonos since 2017 and have had this ad only once. Sonos does not introduce ads in playback of music. Music services like Spotify or Soundcloud may play ads if you have a free account with them, just like your average radio station.