Low car counts is almost always the main reason local tracks close down. Sure there might be 20 cars out there with little to no chance of winning, but there is nothing more depressing than watching a dozen cars or less competing. At least the field fillers produce extra noise, and obstacles for the 6 teams that figured out the right setup. Indy car struggles to field 20 slots outside of Indianapolis. Cart was fielding less than ten cars in it's final year. Once you go down the road of telling lesser teams they are no longer welcomed, get ready for 24 car fields at Daytona, and 15 car fields outside of the southeast.
Hendrick will field 3 or 4 cars, haas has 1 car with full time sponsorship, Penske 2, Childress 3, Gibbs 3 or 4, ganassi maybe 2. So yeah, if I was Brian France I would be kissing every owners ass regardless if they show up with millions of dollars worth of equipment and staff, or a uhaul van & trailer with an all black painted car and barely a skeleton crew.