lots of people have made knock offs over the years that were pretty much just small variations of the pixel model. I'll try to find some examples and post em.
The way it originally got traffic was that he shelled out big money for press releases. Once the press picked up his project the site started getting alot of attention and traffic. It was more viral than anything else. Also, once the million dollar homepage took off he put lots of money back into press releases to keep the buyers coming.