I am actually not too sure whether it matters. The amount of people that have the skills to implement such a solution is not that high. There are are only so ma

I am actually not too sure whether it matters. The amount of people that have the skills to implement such a solution is not that high. There are are only so many people who can do high performance kernel, encryption and networking work. They might give the advantages away if they release everything, so that others can simply deploy it or offer it as a hosted solution. But the pure documentation what they did are more like advertisements for interesting engineer work @ Netflix.