Why is there such variation in the breadth and depth of content presented on individual LEPnet.org project Web sites?

Each LEPnet.org Group is developed individually by the contributing author(s). It includes as much material as is available in a digital format, or can be cost-effectively prepared while free of Intellectual Property and copyright restrictions. Contributors participate voluntarily, and publish only as much content as they are comfortable having on a Web site that is freely accessible worldwide.