Finally the number one reason why you should join a social networking website is because most are free to use. Check it out, Facebook, Orkut, MySpace and LinkedIn cost you nothing to join. Then there are other online networks in which you are required to pay to join. These paid networks offer you membership benefits. Since most social networking websites are free to use or at least free to try, you are encouraged to give them a shot, you can always opt out or cancel your membership anytime.