The simplest and maybe yet hardest. Bring sponsors to the events so that the purses get bigger and guys have to at least think twice about bringing their cars out and try for the extra cash brought in. I think that works for Crown cars dirt and asphalt.

Now when you talk about sprints or mods or whatever; you will see time and time again lower car counts for more money. Reasons being higher cost of admission; and the extra competition it brings in (faster cars and drivers), leaving budget racers thinking they can't make the show or even if they do they will have to really run the car hard and risk it to still be middle pack. {Which may be true or untrue depending on situation.}