The reason this works is quite simple - Eastern NC BBQ sauce is a simple Vinegar based sauce that's fairly thin, but packs a nice punch. You can use any sauce, such as my recipe Eastern NC BBQ Sauce, or when I'm in a hurry, I like George's Original BBQ Sauce - it's a bit sweeter but it really works.
Alternatives
You can add pickle juice or even jalapeño juice for an added bite. You can also use your favorite Bloody Mary seasoning mix, just be careful with the heat - the BBQ sauce replaced the hot sauce and vinegar found in most recipes, so spiciness is built in.