I received the following email from Von Routte and it appears the deal is open to the public, not only to email newsletter subscribers. I haven't bought Von Routte shoes, so I can't vouch for their quality, but 20% is not to be sneezed at.
"Get Vaccinated and enjoy 20% OFF*
Promotion valid on full price items until end of lockdown in Sydney (no need to be in Sydney to participate)
How to get the voucher:
- Get any COVID-19 vaccine available through your GP, Pharmacies or Mass vaccinations centers
- You may be issued a vaccination certificate. Otherwise download yours through myGov website
- Go to our instagram @vonroutte and DM us your vaccination certificate
- We will issue a personalised coupon to be redeemed online"