I believe this is practically pure profit for DAVE as these are licensed products. From the 2008 10K "We are also creating awareness for the Famous Dave’s brand through product and brand licensing arrangements that extend our barbeque sauces, seasonings, rubs, marinades and other items in retail outlets across the United States."
FD sauces have been in my grocery store for at least a year, maybe more. It is a small chain in southern WI, Woodman's (about a dozen stores -- they are a very high volume, good, cheap chain). I haven't checked other chains in the area because I do all my shopping at Woodman's.