To get 4 FREE Mini Tacos at 7-Eleven download the 7-Eleven app and play the Pokemon game on the top right. Play the Second round where you have to find the clues on three levels, then click the share button. For doing that they will give you 4 Free Mini Tacos. It doesn’t seem to get added to the app immediately, but it will show up soon. They will have more rewards in future rounds as well.