A Purple Cow I just stumbled upon
I finally had four Jet Blue flights in a row, enough time to watch my copy of Memento. This movie cost about $5 million to make and was one of the most profitable movies of the year (last year... the year before?).
It succeeded because it was remarkable. The movie runs backward. There are websites around the world devoted to decoding it. And the official site (which couldn't have cost $10,000 to make) is brilliant and only reinforces the puzzle.
Just as I sought out the movie ("people who bought Pi also bought Memento...") and told you about it, thousands of others did the same--
That's the point of the Purple Cow. Spend your money on reaching people who care, and who sneeze.