I wouldn't spend too much time worrying about contributing to the demise of the sport by proxy. Spend your money your way, hunt your way and teach your kids sportsmanship. Sometimes people read into that stuff too much... just go out and kill something and don't lose any sleep over which hunter signs a contract with which company.
We don't need those guys (Randy A. - Jackie Bushman) as much (now that we've been hunting a while) but those videos are priceless for new hunters coming into the sport... take that away (both pros and cons) and our sport would suffer. Hunters are a declining breed as it is, take away the commercialism (pros and cons) and it will fall faster. Just the way it goes, so like I said, do your thing and kill all ya can while having a good time.