[Infographic] Social Networks Come and Go -- and Come Back Again

As sites like Pinterest, Instagram and Foursquare make a play for ad-based sustainability, it can be easy to forget about the networks that came before. Here's a look at the rise, fall and return of some of the early social networks.

Social media has been around since the late ’90s. Though Facebook and Twitter have become household names, plenty of social networks have floundered — and even failed — over the years. Just think, MySpace was all the rage in 2002 and by 2009 it was struggling to maintain relevancy.