After several years at LinkedIn I started to see the ugly side for what it was. I saw how e-staff seem "amazing" in front of a crowd but are often arrogant jerks if you actually have to work with them. People cower around senior leaders trying to keep them happy and there is a lot of deferring to the most senior person in the room. I also saw good people get pushed out and overly-political and ruthless people get promoted (though I say that having been promoted twice while there LOL).
When I left it had become way too bureaucratic, too political, and too fearful (crouching in a protective position vs. innovating and actually "taking intelligent risks"). Also don't join LinkedIn unless you love meetings - the company value of "Collaboration" means no one is empowered to make a decision until you get a dozen people on board, requiring 30 meetings to get there. It can be collaboration at its worst.
Overall I'm grateful to have had the experience, but am glad to have shaken that cult-like LinkedIn-worshiping mindset.