A “chad” as it turns out is urban slang for single, white guys, in their 20s and 30s.  Chad refers to the stereotypical preppie name used in movies and books to depict the classic preppy, entitled, wealthy, white kid.  So, in essence, a small group of non- MJ BIZ CON attendees complained about too many rich, white guys who are all corporate, and about making money, attending the show and not enough people who love the plant more than money, aka, hippies.