McDonald's will be giving away 100,000 Cheeseburgers exclusive to mymacca's app members with any purchase on National Cheeseburger Day, Monday, 18th September 2017 ONLY.
Also Leading up to National Cheeseburger Day, McDonald's will be offering mymacca's members a Golden Meal which is a Small Cheeseburger Meal with a free Fries and Coke. This offer will be restricted to the mymacca's app and available from Wednesday, 13th September 2017 to Tuesday, 26th September 2017.
I am guessing you will be only paying for a burger and get a meal.
Pay for burger and get small meal free