I found this on p128 of yesterday's Daily Telegraph (Sydney). Here are the details from the ad:
TAKE A MATE FOR FREE*
Buy one ticket to the South Sydney Rabbitohs vs Sydney Roosters match at 7pm Monday 5 March at ANZ Stadium and you can take a mate for FREE*.
The discount is available via ticketek.com.au/matesrates, or call 132849 or at the gate on game day with the password 'MNF'. Tickets also get you FREE train travel to and from the game.
- Offer only available in general admission.
Had to google what BOGOF meant lol