CircleID

I think the SEO rockstars covered a related point once.

They had a site with database driven content, and when the database was down but the Google ads still worked, the ads got a much higher click through rate.

If the ads are the most interesting thing on the page, people will click on them. The problem is how to get people to visit boring pages with nothing but adverts, catching when they guess or mistype a domain name is one way. Many of these parking folk are daft enough to put a search engine box on the parked pages - doh.