It's true, America is divided among three racing venues - Drags, Ovals and Road and if you throw Indy in the mix it divides the fan base even more. It also doesn't help that the ALMS shitheads and the Grand Am shitheads are competing for fans.

America also has more major sports than any other nation. Add that to the mix and the fan base gets depleted pretty bad.

But none of this has anything to do with the dismal amount of cars at ALMS races. The fans still show up, but the cars don't, not in ALMS anyway.