Download the app, make an account (who hasn't yet?), claim.
Don't be surprisedpikachu.jpg when it's OOS in a few minutes. It starts 8AM AEDST every day. Miss out? That's on you.
If you've previously claimed this reward from Snackback, you'll get the SAME gift card / voucher as before.
Where's the Bunnings or JB card?. It's always this or Hoyts.