FACEBOOK
Just received this. Link has my details from the email though doesn't look like I get anything so hopefully doesn't count as a referral.
Similar to previous https://www.ozbargain.com.au/node/209537
copy/paste from email:
When your friend buys our UNLIMITED 2GB plan online and uses promo code: FACEBOOK, they’ll get 30% off for their first 3 months.
They get a good deal, you get good karma – everyone wins! But hurry, this offer is only available to top 1000 people.