To be clear, this doesn't mean teens aren't using Facebook. It just means they don't call Facebook their "most important" social network. That's a huge difference: more teens are likely still using Facebook than Twitter, they just don't consider it their most important social network.
This means Facebook has essentially reached utility status, which is reflected anecdotally in my life. It's replaced email for a generation. But that's arguably a fine place for them to be: if you own the entire backbone of people's communications, there's a lot of money to be made in that. You'll find a lot more teens who use Facebook but not Twitter than the inverse.
To put it another way, if asked I'd say Hacker News is "more important" to me than Google Search. But Google definitely makes a lot more (potential) money off me.
This means Facebook has essentially reached utility status, which is reflected anecdotally in my life. It's replaced email for a generation. But that's arguably a fine place for them to be: if you own the entire backbone of people's communications, there's a lot of money to be made in that. You'll find a lot more teens who use Facebook but not Twitter than the inverse.
To put it another way, if asked I'd say Hacker News is "more important" to me than Google Search. But Google definitely makes a lot more (potential) money off me.