Just reread the old Chowhound.com "ethics statement" from back in the day.
Ethics Statement (from Alpha Hound Jim Leff)
I guard my anonymity and my opinion cannot be bought. I always pay my own tab, and this site will never contain food advertising. May I eat nothing but Wendy's for the rest of my life if I ever offer less than purely objective chow advice.
And now we have a board dedicated to chains, and- oh- one or two food advertisements :)