[quack]

> You're just making up a random fact to support your case, and leaving the burden on the reader to substantiate your claims, correct me if I'm wrong.

And the only fact supporting your case is a sentence from Facebook's Q3 report. Total active teen usage was stable while younger teens are dropping off. If you want to claim that Facebook was downplaying the extent of the problem then that's a very bold assertion. Hiding critical information such as that for investors is what get's executives in trouble. It's also why they bothered to share a piece of information that sent the share price tumbling 20% after an 18% jump.

The use case of Facebook is not messaging. It never has been. The use case of Facebook is their social graph. It's your online identity. It's being the lowest barrier of entry to use the internet.