I bet people won't think I'm so crazy now for posting before that the only reason Microsoft paid the incredible amount of $8.5 billion for Skype (and 2x as much as Google was willing to pay) for no good reason, is because they already knew they were going to make at least half of that money back from NSA:
http://www.theregister.co.uk/2009/02/12/nsa_offers_billions_...
Also this: "Microsoft's patent application for Legal Intercept was filed in 2009, well before the company's $8.5 billion purchase of Skype in May":
https://www.computerworld.com/s/article/9218002/Microsoft_se...
So they were already preparing to make it a spy technology before they even bought it. Microsoft bought Skype in May 2011. Look at the PRISM slide. They adopted PRISM for Skype in June 2011, a whole month after they bought it (in a hurry much?):
http://www.washingtonpost.com/wp-srv/special/politics/prism-...