> I'm interested in who is the driving force behind this open source change in Facebook, I don't recall facebook in behaving these way 4 years ago. [..] Can any

> I'm interested in who is the driving force behind this open source change in Facebook, I don't recall facebook in behaving these way 4 years ago. [..] Can anyone find anything on a policy change that happened? They really turned around. My guess is that Facebook was just much smaller 4 years ago, over that period its staff grew very quickly. And even today it has an order of magnitude less employees than say Google, Apple, Microsoft, etc. Larger, more established companies have more opportunity to open source things on this scale.