How is CarsForAGrand monetized?

I've been reading up on the whole CarsForAGrand.com thing a bit in the last couple of days. I also took a good look at the site.

Besides one Google ad box on the bottom of the left column, I cannot detect any other ways of monetization for the site.

Most of the sites talk about the author of the site as a person "earning a six figure salary thanks to the site."

What am I missing here?