Facebook is leaking valuable younger users

Facebook has been struggling to bring in younger users for several years now and it looks like the problem is getting worse.
According to Piper Jaffray Companies, a recent survey of 10,000 U.S. teenagers showed that 52% used Facebook at least once a month this fall, compared to 60% who used it monthly in the spring.
"Factoring out shifts in the population surveyed, core Facebook usage likely declined by three basis points, which indicates Facebook is gradually becoming less relevant versus Inst