Did you observe that most burger king kitchens are observable from behind the counter?

Additionally they deliver the source of the burger in addition to the precompiled burgers when you take it away. (Image 1)

You only have to pay for the service of precompilation and delivery to you, while you are totally free to request the sourcecode of the burger and compile your own burger at home and you can even commit your own patches to the sourcecode and request the compilation of your own code by the burger compiler back in the kitchen.

You are also free to share your modified burgers/recipes with others and fork your own burger project.

Which means: BurgerKing bugers are free hamburgers! 😉