ARCA has served as a "sidekick" to NASCAR practically since day one at the blessing of the France family. Bill Sr. and Arca founder John Marcum were good friends, and Bill Jr. continued that relationship, giving ARCA the opportunity to run at ISC tracks and be an opening act for NASCAR weekends. When Marcum died, the series was taken over by his daughter and son in law Ron and Suzie Dager. The series struggled mightily in the late 70's-early 80's even going so far as to run companion events with the quickly dying USAC stock car division. By the mid-80's ARCA had a resurgence (wouldn't be surprised if France family money was injected) that lasted until the mid 200's when things started to get pretty lean again. With the Dagers getting up in age and the series struggling, it was probably down to a matter of "Buy us out, or we're closing it down. Probably because the France family still sees SOME value in it, and partially out of decades long loyalty to the Marcum/Dager family, NASCAR absorbed it. I am 98% sure it doesn't exist today if they don't buy.