(Other Targeted) Telstra Customers: check https://hub.telstra.com.au/offers
From time to time Telstra change the bonus deals available with the Telstra TV (a rebadged Roku). Right now they have 6 months of Netflix available to all customers regardless of Netflix deals taken in the past, that's right, new and existing customers/owners of Telstra TV's, all you need to do is log in to your Telstra TV account and claim your free 6 months!!
Once applied your Netflix account will be $72AUD greater off. You can upgrade to the UHD plan for 4 months or stay on the HD plan for 6 months or lower your plan to the SD version and get 8 months paid for in advance. Once the credit runs out your credit card is charged again.
Netflix 6 month offer: Valid for 6 months of Netflix Service when you redeem before 14 February 2017 on the AU$11.99/mth “Two Screens at a Time Streaming Plan” (total value $71.94). Not redeemable or refundable for cash, subject to applicable law, and cannot be exchanged for Netflix Gift Subscriptions. You may apply the value of the offer to a different plan, or other services offered by Netflix. Exchanges in this manner may alter the duration of the offer. Netflix Service price plans subject to change. See netflix.com/termsofuse
Netflix gift cards cannot be redeemed on an account that is billed through certain third party partners, such as iTunes. To redeem a Netflix gift card if your account is billed through such partners, you must first cancel your Netflix billing through the partner and then redeem your card at www.netflix.com/redeem once the billing period ends.
Mod note: According to this comment, the netflix offer can be redeemed up to 31 March 2017.