It's funny that they would experiment Ed's sauce with the fries before they put it on the burgers

After all, it did look a lot like fry sauce! Ketchup and Mayonnaise that's been vigorously stirred together. I wonder if they ever had to sell separate containers to put Ed's sauce to be dipped into French fries as well for customers who don't want ketchup, and it is after all a fry sauce!