I had a customer from New York come by one day and said that when he lived there "his guy" added two smashed Garlic cloves, a cap full of White Vinegar, and crushed Red Pepper flakes. I haven’t tried it yet myself, but I’m a bit concerned that some people won’t want all that "extra" flavor and added kick. They just want their dog and add the toppings to get their flavoring. It could be the best thing since "sliced bread", but I need to try it myself first, personally it sounds fantastic…but I like things with a nice kick.
I look forward to hearing what others might have tried or have heard about.