FaceBook became more popular than MySpace when it opened to the public due to its easier interface and increased privacy and security features. FaceBook has a simpler and cleaner interface than MySpace, which requires coding for customizations. It also has stronger privacy settings, requiring friend requests rather than allowing public access. Photos and other media also load much faster on FaceBook compared to the long wait times on MySpace. Overall, the document analyzes why FaceBook surpassed MySpace as the dominant social network due to its usability, privacy, and performance advantages.