The free offer is just for the Thursday March 13th free tickets to the F1 at Albert Park. Good to grab the free one and stay for another day or two. If going to all 4 days the 4 day pass is $55 cheaper.

Get the free tix here:
General Admission | 2014 Formula 1 Australian Grand Prix

Well known as a favourite of F1 teams and drivers alike, the Albert Park street circuit is the perfect setting for the opening round of the 2014 FIA Formula One World Championship™.
General Admission fans can enjoy all the on-track action from a variety of vantage points as well as a bumper line-up of entertainment away from the track.

Don’t miss the thrills, spills and drama that fans have come to expect from the first race of the season.
Lock in your General Admission tickets before 1 March, 2014 to take advantage of the special early bird prices.

Early Bird General Admission Prices - Purchase Before 1 March, 2014
Type Adult Concession^ Family Tickets
Four Day Pass $149 $79 $280 Book Now
Friday only $55 $27 $110 Book Now
Saturday Only $70 $48 $135 Book Now
Sunday Only $79 $55 $159 Book Now
^Valid for children 13-15 years old, holders of a State Government Card, full Pensioner Concession Card Holders and full time Students. Identification must be produced at time of purchase and on request upon entry into the circuit.
*Price based on cash purchase from Ticketmaster outlets, prior to March 1. Tickets purchased by other means attract delivery and credit card fees.Conditions apply, Click here for Delivery Fees.