[Qui Gon Jinn]

I appreciate what you are trying to do, hopefully this would include hybrids too, but the easiest solution might be that if there is a closed brand bidding group, then the cookie should NEVER overwrite other content affiliate cookies, then perhaps the appeal of BBG's to the familiar parties will gradually diminish & then there is no confusion on what is & isn't brand, misspells, variations, typographical errors & hybrids.