Don't understand why you are all arguing over this, this is PURE RACING, the qualifying is done by the pure fact that you have been CHOSEN to partake, so, it is a race off, 8 races, 8 cars per heat, and you start on every single grid position, simple as.
This isn't the world champs, this is a bespoke meeting, held regularly every year for the TOP guys to race against each other. Who wants boring qualifying, let EVERY race count, much more fun.