Code is provided in the email if you are targeted.
I think this is tied into owning a Pixel device, but just received an email from Google offering 20% off. Not the best price, but still ok.
"Get the Google Pixel Watch on sale for AU$439.20 (Wi-Fi) or AU$519.20 (4G LTE). Pixel phones and watches are engineered by Google for personalised help throughout your day."
Pixel watching incoming?