Just over three months ago, Facebook was rocked by a data scandal and the company was at a crossroads. The share price plummeted, users were outraged, and some experts even called for the company to be broken up. The excitement has now subsided, the share price has recovered and the large exodus of users has not occurred. On the contrary: Facebook's online empire continues to grow. This week, Facebook subsidiary Instagram announced that it now has one billion active users. As the graphic below shows, Facebook's biggest competitors can only dream of reaching this milestone. Twitter, Snapchat and Pinterest each have well under 300 million active users - Facebook, on the other hand, has now broken the billion mark with four platforms.