Sonos: Unique Coupon for 20% off on website YMMV Check email

I received and email with a unique coupon code for 20% off most products on Sonos.com
The great thing about the coupon is you can buy from any retailer and submit a claim for to get 20% cash back. The coupon is good on pretty much anything Sonos sells for home audio. Best Buy and several others qualify
Here is the link to find local retailers
https://sonos-welcome.com/us/en/p…-retailers
Here is a list of eligible products
https://sonos-welcome.com/us/en/p…qualifying
It is YMMV as the coupon is a unique code
Qualifying Purchases
In order to participate in this promotion, you must have received your unique code from Sonos and purchased a Qualifying Product (as defined in the Terms & Conditions) from a Sonos authorized retailer prior to 11:59PM March 20, 2019 during (the "Promotion Period").
Participants who purchased Qualifying Product(s) during the Promotion Period from Participating Retailers will be entitled to claim a Cashback Reward equal to the value of 20% of the purchase price paid for the Qualifying Product(s), up to a maximum Cashback Reward value of the following for your local currency: USD 200, CAD 250, AUD 260, GBP 160, EUR 200, SEK 1,650, DKK 1,250, NOK 1,620, CHF 200.