Too many classes and dwindling car counts I believe are the main reasons, I think you can still draw a crowd, You just have to have the product.

When I was young, there wasn't twenty five classes of dirt racing. There were Sprints/modifieds. Late models which were a caged souped up street car and some sort of hobby stock like a VW Beetle class. Now theres 305-358-360-305 602s-604s racesaver 410 and steel block sprints just in one class. KNOCK IT OFF.

Also everything is more expensive. If you want a competitive car. A hundred k plus spares. The top tier of dirt racing used to be a bunch of mechanic and farmers who needed some mid summer activity and could afford to do it. And for fans, It cost a hundo to leave the house for about anything anymore. Believe it or not, Tracks are reasonable in the sporting world when it comes to concessions. Go to a movie or baseball or football game. 20+ to park, 10 beer, 8 mcdonalds size hamburger