Some new deals appeared on my Altitude Platinum card this morning:
Myer - get $10 cashback with $100 spend (exp 24 Dec)
Cotton On - get $10 cashback with $50 spend (exp 20 Dec)
Kogan - get $20 cashback with $100 spend (exp 27 Dec)
As mentioned by Melbournian/ Kerfuffle/ elcheapo in the comments, you may possible also have:
Typo - get $10 cashback with $50 spend (exp 20 Dec)
JB Hi-Fi - get $10 cashback with $60 spend (exp 24 Dec)
14 Days of Cheese - get $10 cashback with $80 spend (exp 3 Jan)
Country Road - get $20 cashback with $100 spend
Hobby warehouse - get $12 cashback with $60 spend
Check your Rewards & Offers section in your Westpac credit card to see if you're targeted.
I have the Typo offer instead of Cotton On.
Also, JB Hi-Fi, get $10 cashback with $60 spend (exp 24 Dec) and 14 Days of Cheese, get $10 cashback with $80 spend (exp 3 Jan)