Within the next 10 years, and maybe much sooner, the vast majority of content on FB/Twitter/Reddit/LinkedIn will be completely fake. The "people" on those networks will be fake as well. Sure there are bots today, but they're not nearly as good as what I'm talking about, and they don't exist at the same scale. Once that happens, the value of those networks will rapidly deteriorate as people will seek out more authentic experiences with real people.
IMO, there's a multibillion dollar company waiting to be founded to provide authenticity verification services for humans online.
Ironically accounts with Twitter's blue check mark are often the accounts most likely to be managed by a social media manager.
Now that's authenticity verification.