I have been looking to renew my Norton and came across the cashback deal at Harvey Norman.
So for 2 Devices cashback is $20, 3 devices $30 and 5 devices and above its $50.
Deal details : https://phoenix.symantec.com/anz/cashback203050/index.html
I am not sure what other stores are participating in the deal but JB Hi-Fi has this promotion as well.
Called Officeworks and they don't do Cashbacks anymore as per the sales rep.
Bloody expensive for a 'slow'ware.