[kick]

Twitter only has something like 70,000,000 active U.S. users, Facebook only has 244,000,000 in North America and Canada combined. That's nowhere near the entire U.S. population, and probably half of those take photos with their phones.

[cameronbrown]

You're forgetting the dozens and dozens of other social networks: Snapchat, Instagram, even email and SMS get heavy usage in the US.