MySpace is popular because of peer pressure, people want to be cool and they think MySpace will do that. If someone has 20 friends on MySpace chances are that they will join. If someone has 20 friends on FaceBook then they are more likely to join FaceBook. But after a while people get bored they have better things to do, maybe study or work, but occasionally they still log on to seem like they are there with everyone else. Thats why people join online social networks like myspace.