Note: This is not a duplicate - As the last post has been more than six months since it was posted.
This is a well known reoccuring deal where if you register for a new Guzman Y Gomez account under a different email, phone number and phone device serial ID (new customer), you will be eligible to claim a free full sized burrito (or any other item, with a credit of $12.90 to $14.90 - price depends on the store cost of the burrito, this can be different depending which store you order [eg. Adelaide priced GYG is different to Sydney priced GYG]).
The title has been changed from $11.90 - $12.90 to $12.90 - $14.90 due to inflation and price changes to the burrito value depending on where you are located. Additionally, the Free Burrito may be claimed within 6 months of signing up.
Note:
They save the Device ID so you can't use the same device if you've already used it to claim the Free Burrito in the past. Workaround - and this was from the direct word of a GYG employee themselves - Delete the app then re-download it, ensuring you sign out before deleting it. Before redownloading it, reset your device's IP address by going into Airplane mode for about 45 seconds then back to data or wifi. Then create a new account.
Requires SMS Text verification with an Australia Mobile Number to get the Free Burrito credit.
No doubt the Collective identified it as Individualism which is certainly not allowed in the Collective.