Quite interesting article on the dynamics of launching social networks.

They basically try to have every user from a specific community start using the service at the same time, creating strong community wide network effects from launch instead of a fragmented user base with the traditional approach where users install at different times from their social peers as they learn about the app through marketing or word of mouth. Making so new users rarely have contacts on new apps whenever they try them out.

It seems the only reason this was targeted at high schoolers is because they focused their community boundaries on each high school, but this approach seems promising for any new social network targettig any community of any age