Title and image says all. Free Woolworths gift card when you sign up for a mobile phone plan (4GB or 8GB) with Woolworths mobile.
On the SMH Front Page this morning.
Edit: Has to be a phone bundle plan and not the prepaid/postpaid sim only plan. See this link for details: https://mobile.woolworths.com.au/
Minimum $50 per month for the 4GB plan. Not bad for a plan with a phone, though as far as data and calls go it's overpriced - can get the same without being locked in for 24 months for $30/month.
(Though the Woolworths plan does include 150 minutes international if that's what you need).