try this link https://www.sonos.com/en-us/cr100?utm_source=owners-all&utm_medium=email&utm_content=cr100infolink-US&utm_campaign=goodbye-cr100_reminder
It mentions 1 per household but if you have more than 1 CR100 they will give you a voucher per CR100
Respect the Queue (2)Move (3)Beam (1) Era100 (2)ARC (1)SonosOne (1)Playbar (4)Play5 (4)Play1 (3)Play3 (1)Port (2)Connect (1) Roam (2) Ace (1)Connect:Amp (4)Sonos Amp (1)Sub + (9) Echo + Smartthings; (2)Play)