It's been a couple years since I was informed by a friends teenage son that Facebook was for old people.
The kids be using instagram and snapchat these days.
Facebook will eventually die the same death as Myspace. The only reason it has stuck around longer was that it didn't go full on retard as quickly (IMHO, Myspace was killed by the ability to personalize your page to the degree of insanity) I don't know if it will be replaced by MeWe or something else, but it will be replaced eventually. It's already lost it's "cool" factor.
I think Amazon will survive, but I have a feeling it's going to have to go through a few adjustment periods as time goes by, just like every other business.
And all this makes me wonder... What happened to myspace?
Edit to add: It's still there! But I forgot all my login stuff...
