Activating and using the Upgrade Program discount doesn’t mean you have to send back or trade-in your Play:3. You can keep it and continue to use it.

From Sonos:

What happens when I upgrade?

When you click Activate credit, your account will be issued an upgrade credit. You can use it immediately or save it for a future purchase. It does not expire.

Nothing happens to your eligible product when you activate or use your upgrade credit. There is no "trade-in" necessary to participate in this program.

Wow the Sonos web site must do a terrible job of explaining the Upgrade Program if people think this is how it works.

@GuitarSuperstar 

Thanks for the reply - the reason I thought I had issues was that when trying to add my Play3 yesterday it would not add and was saying that I needed to to register the play 3 - this was me then thinking that they had somehow disabled the registration of the device until they received it. I later had another attempt at adding my device to my network and it worked...so all good ….except the pain that I have had trying to get the device onto my network for the last 48hrs :-(