@dangillmor People do not, in general, leave platforms because the policies and/or leadership are bad.
Lots of people are still on Facebook, and you don't get a more open-and-shut case than that.
You can't moralise your way out of this problem - only regulate.
@tomw @dangillmor Yah, but Facebook can wither quite effectively with it dying. Things don’t tend to explode in the same way they give birth. Fizzling out is the norm, actually.