I don't buy it. I really don't.

We know about the incredibly close ties between silicon valley and the military. We know that the US government collects anything and everything, and that US corporations are complicit (or made to be complicit) in the act.

It is most likely that Greenwald was leaked these documents to create a facade of government-corporate animosity to revive trust in US corporations, all the while there existing a backdoor to facilitate snooping.