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.One of the early Gopher/FTP sites was at tudelft and was called the Digital Archive on the 17th Floor (List of websites founded before 1995).This small image archive contained some low quality scanned pornographic images that were initially available to anyone anonymously, but the site soon became restricted to Netherlands only access.
These BBSes could charge users for access, leading to the first commercial online pornography.
This type of distribution was generally free (apart from fees for Internet access), and provided a great deal of anonymity.
The anonymity made it safe and easy to ignore copyright restrictions, as well as protecting the identity of uploaders and downloaders.
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.