As the title says, free burritos for the first 1000 customers on Wednesday 26th August, from 10am - similar to the opening of the Brickworks store (https://www.ozbargain.com.au/node/199806). I got one at the Brickworks opening and it was a large size and includes basically any toppings you can normally choose (extra stuff like avocado was not possible to add even if you paid - something to do with the cash register configuration). Worth about $10-12 from memory.
If you're planning to go during your lunch break, make sure you plan for more than half an hour, the queues will probably be quite long and they're made on the spot like subway
All these first xxxxx customers only deal means they can stop giving out anytime. All they need to say is 'all the free 1000 are gone' or 'You are the 1001st customer'….Tricky promotion.