The sauce has been around for a while; mayonnaise is the base and has none of the ingredients usual BBQ sauce. One famous BBQ sauce with the initials of E & J has this for the ingredients: ketchup, tomatoes, brown sugar, water, liquid smoke, and cayenne pepper. What every sauce of this type does is burn, “caramelize,” on the meat during cooking if the chef is not careful. They all pretty much taste the same with a few nuances—No pun intended Mary Harf!
I know of one that is better, no tomatoes, no vinegar, no sugar, and it goes on after cooking, making the meat marinate in its own juices, instead of burning on the grill. I will never tell. My friends have threatened me for the recipe. No, I will never tell.
Of course, you are talking grilling, not bbq.