Not just those companies pepeoil, but when you watch a camper series race you will see many smaller companies advertising on the trucks. I noticed that when I watched my first race last Fall that had a Koma Unwind truck involved.
I have nothing against racing. I have something against a guy who is supposedly building a startup company and then buys a race team witht their money instead of building the company. Oh and then wipes out those investors with a R/S.
All of those companies have a well established product and company and yes it makes sense to advertise that way. BW's hobby has been racing long before BBDA and you sheep use the same excuse over and over again to justify him using your money for a hobby. Also it is truck racing not the NASCAR that everyone watches.