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.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 method was also used to disseminate pornographic images, which were usually scanned from adult magazines.
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.
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).
On the Web, there are both commercial and free pornography sites.