Domain Parking - How they make money doing that?

[Farmer77]

I was looking for domain names in a particular niche, but it seems anything I typed was taken up by someone using domain name parking. How on Earth do people make money doing that? I can't imagine them making enough from type-in traffic to pay for the domain name. Perhaps I'm missing something here?

[deronsizemore]

People park domain names, the place they park it ad places ads on the parked site, people visit domain, click ads = owner makes money.

It's really worthless to park domains unless you have a really really really good domain name. Something like www.blue.com that millions of people will type every day. If you own a domain like www.find-best-online-flight-deals.com and park it, you'll not make a dime.