The auto aftermarket size is more than $300 billion EVERY YEAR in the US, so why don't digital marketplaces like Cars.com and CarGurus list aftermarket auto parts?
I'm curious why these digital marketplaces limit themselves to simply marketing and listing dealerships and not aftermarket parts sellers like AutoZone, O'Reilly, Advanced Auto Parts, etc.
After all, there must be demand from these aftermarket sellers to advertise on such high-traffic car sites, and demand from consumers to find aftermarket parts on these sites right? If I visit a website called cars.com, I'd expect to find everything car-related there, including buying parts for my car.
Feels like a huge untapped market. Asking because I'm trying to understand their business models. Any help is appreciated. Thanks