Social media apps come and go with teens, but it looks like Snapchat is making a comeback. Snapchat is projected to rebound in 2020 with a 14.2% increase in global consumer usage and is expected to generate $1.53 billion in net ad revenues, eMarketer predicts. The research firm also predicts users in the 12 to 17 and 35 to 64 age range will increase by double digits percentages, and attributes overall growth to a redesigned Android interface and filters and other new features.