Facebook Saved $1B Dollars By Building Open Sourced Servers

This is not Open Source in the traditional sense of OSS, but it is rather open source platforms (hardware, specifications, technologies and software) through the [open compute](http://www.opencompute.org/) initiative.

The article is very scarce on detail, but let's take Zuckerberg's word for it that they saved 1 Billion. I am curious if that is simply the energy saved or also less tangible benefits like better cooperation and integration.

Also, how do you arrive at a comparison? It is not as if there wouldn't be progress without the Open Compute initiative. Let's hope they bring out the numbers in more detail