Earlier quoted context omitted.
A 10% margin also often doesn't tell the whole story of how they make their money. Nearly since its inception, a substantial portion of McDonald's long term profit came from the appreciation of the real estate the stores were built on. Operating a business on it just made it cash flow positive during the holding period. So it was essentially a REIT that happened to operate a fast food chain. Even for many mom-and-pop…
McDonalds is a franchise, isn’t it? Corporate doesn’t own the stores.
McDonald’s model is pretty different from standard franchises.