They sell stuff. If you ever been to a desert off road race its the same as the tech line on friday where its a big circus type atmosphere with anything and everything involved in the sport. In the case of the king of the hammers they race thursday and friday to try to keep the crowd to a minimum, as the hammers tend to get really crowded. There's really only 1 way in and 1 way out of the trails and the trails themselves are really tight. Kinda like crowd control cause most people at work. That saturday is gonna be a MAD house with everybody and their mother out cloggin the trails. Good times for sure though