The Deezer offer is a Sonos promotion, but I believe the 5 year warranty is only by Richer Sounds. Buy any Play:1, Play:3, Play:5, Playbar, Connect, Connect:Amp and claim one year's free subscription to Deezer Premium + (normally £9.99 per month)
For the sake of clarity - and not to push House Rules to the limit! - the 12 months of free Deezer Premium+ is indeed a SONOS promotion - applies wherever you buy SONOS PLAY: 1, PLAY: 3, PLAY: 5, PLAYBAR, CONNECT or CONNECT: AMP between now & 31st December.