I don’t think cards move anyone through quicker. Look at Homedepot for example. To many steps, plus how would you like to receive a receipt? Menus. Sometimes you need to just look for a minute to see what strikes you that day. Typically because you are not the one that suggested the place. McDonalds can use what ever gimmick they choose. They won’t sell much more or become busier because of gimmicks. Lines are not long anyways. If they want to be busier, then change the food and hire quality people like Chick-fil-A.