While there is a bounty of useful items on the Internet, there is also that vague area of things that serve some purpose, but by themselves, would be utterly useless.
An obvious example of this is a Web counter. Create a Web page by putting nothing on it other than a counter. Put it on the Web. What does it prove? If people actually go to your site, they are insane? True, but in a sense, we already know that everyone is crazy.