You can pursue these people forever, and they are in love with selling their banner ad space. They should be in love, because selling banner ads, if done frequently, is easy money. But more often than not, the sites with the most banner ad impressions do not yield buyers. Once again, this is good for branding. But if you want to make sales, the context of the site must be towards buyers.
People look at the info and click onto other sites that sell cars and insurance.
People at Edmunds are buyers, and the results they generate show that these buyers are converted to sales. Remember that banner ads rarely convert to sales. The best things in life are free, but the best things in business are not. Most free sites, including all those community sites that offer free home pages, create a bunch of people who are often not willing to pay for a thing. They will post your banner ads everywhere, do little promotion, and expect a lot out of you.