Content is king, just having another social network is not the answer its been done. Facebook made it bigger than Myspace because of its both clean where no one can put up a stupid looking background and confuse everyone and the people who join you actually know you. Myspace was more like a pissing contest to see who had the most friends and had a lot more spammers than Facebook. Find a niche for your community and then you can become big. Faebook started out only for their college dorm not the world see more and he did it just for the fun of it at first.