If you dont want to pay you join a different franchise or start your own restaurant. I fail to see the issue. Nobodys putting a gun to your head to open up a CFA restaurant.
Also Quiznos collapsed and was blamed for one franchisees eventual suicide due to their predatory tactics that locked franchise owners into paying high ingredient costs that they could not make a profit on.
Even for a more "traditional" franchise, where the franchisee is responsible for all the start-up costs, even $50k is small peanuts compared to the full cost to bring the restaurant up from scratch. Calling that "predatory" feels like a gross exaggeration.