There was a a startup, think around the year 2000, that would hire people, but wouldn't tell them the name of the company, or what they were doing, and they couldn't tell anyone where they were working. It might have been called Epinions.
When George Lucas filmed The Empire Strikes Back he found that vendors would overcharge the production because it was a big movie.
So when he filmed Return of the Jedi he crated a fake movie called Blue Harvest so when they were getting contracts people would think it was a no name movie and not overcharge the production.