Smaller social networking sites that have a more specialized appeal can draw enough visitors to generate significant amounts of advertising revenue, especially compared to the costs of running such a site. For example, software developer Eric Nakagawa posted a picture of a grinning fat cat on his Web site in 2007 with the caption"I can has cheezburger ?" as a joke. He followed that with several more cat photos and funny captions over the next few weeks and added a blog so that people could post comment about the pictures. Within a few months, the site was getting more than 100,000 visitors a day. Nakagawa found that a site with that kind of traffic could charge between S100 and S600 per day for a single ad. Today, he spends his time fine-tuning the site to make it more attractive to visitors, who now submit their own photos and captions. I Can Has Cheezburger now generates a respectable income. Nakagawa has no illusions about expanding the site, hiring thousands of people, or selling stock to the public, but he is earning a comfortable living generated by a highly specialized social networking site.