As someone who uses Buffer (free version) on a regular basis, I have to say that I'm fairly amused that it appears as though none of the commenters here have actually read much, if anything, about Buffer. They have quite a lot of information about corporate culture that would have answered some of the questions and concerns posted here. Further, they're a distributed workforce (which I don't think anyone picked up on -- this explains emails vs. face to face conversations).

Some extra reading for you folks:

http://bufferapp.com/about/#our-philosophy (scroll down to the 9 Buffer Values)

http://www.slideshare.net/joelg2/buffer-culture-01-16707113