There are some strange business models out there, and I just found one of them in my web server access logs: FakeZilla is a tool that generates large amounts of fake traffic (pretending to come from many different clients) to a web site, so that if you're running a pay-per-click search engine, text or banner advertising, or any other marketing campaign that require unique hits to satisfy your clients you can cheat those clients out of their money. I thought this was a joke, but it is actually a commercial product, costing between 40 and 160 USD.