images available on the Usenet that are pornographic on any given day' was sheer fantasy" wrote Mike Godwin in HotWired. The research was cited during a session of U.S. Congress. The student changed his name and disappeared from public view. Godwin recounts the episode in "Fighting a Cyberporn Panic" in his book Cyber Rights: Defending Free Speech in the Digital Age. The invention of the World Wide Web spurred both commercial and non-commercial distribution of pornography. The rise of pornography websites offering photos, video clips and streaming media including live webcam access allowed greater access to pornography. Free vs. commercial On the Web, there are both commercial and free pornography sites. The bandwidth usage of a pornography site is relatively high, and the income a free site can earn through advertising may not be sufficient to cover the costs of that bandwidth. One recent entry into the free pornography website market are Thumbnail gallery post sites. These are free websites that post links to commercial sites, providing a sampling of the commercial site in the form of thumbnail images, or in the form of Free Hosted Galleries—samplings of full-sized content provided and hosted by the commercial sites to promote their site. Some free websites primarily serve as portals by keeping up-to-date indexes of these smaller sampler sites. These intents to create directories about adult content and websites were followed by the creation of adult wikis where the user can contribute their knowledge and recommend quality resources and links. When a user purchases a subscription to a commercial site after clicking through from a free thumbnail gallery site, the commercial site makes a payment to the owner of the free site. There are several forms of sites delivering adult content. TGP The most common form of adult content is a categorized list (more often a table) of small pictures (called "thumbnails") linked to galleries. These sites are called a thumbnail gallery post (TGP). As a rule, these sites sort thumbs by category and type of content available on a linked gallery. Sites containing thumbs that lead to galleries with video content are called MGP (movie gallery post). The main benefit of TGP/MGP is that the surfer can get a first impression of the content provided by a gallery without actually visiting it. However, TGP sites are open to abuse, with the most abusive form being the so-called CJ (abbreviation for circlejerk),