This. Yes.
Facebook came within a whisker of establishing themselves as the central communications hub for the planet. They ruined their own business from greed. Grew it huge (instead of long steady growth) and it has collapsed.
Greed
It would not have been a good thing if they became "... He's repeatedly betrayed user trust, and eventually what goes around comes around. " so we are all better off, probably.
I hope the story of Zuck and FB become business school lessons on "greed is bad and will destroy you". Not what they taught me at business school (I was there in 2008) but they should have