Mr. Buck and other domainers profit when inexperienced Internet users type those names into their Web browsers, and once on the site click on related advertisements. In the longer term, they hope to resell their domain names for large profits to companies that want to build real businesses with those Web addresses.
Domainers have generally had a negative reputation. Domain-name trading takes little of the actual effort needed to build a business on the Web, instead relying on clicks from people who simply guess at a site’s name or are too lazy to use a search engine. In its early years, the field was dominated by offshore players and secretive, if not illegal, tactics.
Props to Trademark Blog for flagging this.