But you can't invest in things you can't quantify. You can't make money off of good vibes and authenticity without metrics. Snapchat and the like have thrown enormous money at understanding humans and have the best people in their fields to get this right.
I think what worked 10 years ago no longer flies now. How we socialize on the web has changed, and we're turned off by the traditional mechanics to keep us viewing. There are many alternatives to the service Facebook offers, but I'd like to people aren't 'showing off' as much anymore and are having more 1-to-1 or small friend-group experiences. The larger community is almost always toxic.
Look at cord-cutting: For the longest time we just ignored commercials, until we didn't.