Was out shopping with the missus, she wanted sunglasses so I checked cashrewards before actually purchasing. Noticed this boosted cashback offer so click and collect it is.
They also have a 20% off first pair and 30% off second pair promo going on so some decent savings.
No idea when the cashback ends though.
Don't do it. Seriously, buy your sunglasses from the Cancer Council.
https://www.cancercouncilshop.org.au/collections/sunglasses
They are so much cheaper ($30-50), great build quality and polarised (not good for certain car HUDs).
They have most RayBan style frames too, because anyone who is anyone wears RayBans