My lukewarm take: Jack had absolutely nothing to do with the sauces. Take his backstory (a chef gave him the recipie), his disaster of an appearance on the West Texas Investors Club, constantly being placed in retail stores despite not moving product.
It was Jack's gay brother who made the sauce, got the distribution deals, and got Jack on TV. Jack has and always will be just a mouthpiece, and knows nothing about BBQ.
EDIT: For further clarification, when you imagine BBQ sauces, do you envision a cowboy, a kinda chubby guy behind a billowing smoker, or an effeminate gay man? If you chose three, quit lying to yourself.