This was previously mentioned in this week's Woolworths Catalog specials, but looks like no recharge is required, as per following description on the Woolworths Mobile website:
*If you buy and activate a $30 Starter Pack between 14th October and 11th 17th November 2015, you will qualify for a $20 Woolworths eGift Card to spend on whatever you wish in store.
The $20 eGift Card will be emailed directly to the same email address provided at activation and will be sent within 72 hours of activating the SIM card*
CONFIRMED hopefulness: A good deal if you had previously purchased (but not activated) the half price Starter Pack for $15 (https://www.ozbargain.com.au/node/211667), or even better, the targeted EDR special Starter Pack for $1 :)
Here are the printed terms and conditions http://files.ozbargain.com.au/upload/27551/34060/image.jpeg
It does require 1 recharge