You're jesting, but this is actually a very legitimate concern.
It's not enough to poach people away from the intelligence agencies, they have to land somewhere that they won't continue doing the exact same thing for someone on the other side. Remember how much people howled about Snowden being an FSB mole? It wasn't entirely groundless. A public exit to a known competitor doesn't look good.
Oh, I don't know. Now that Google et c are encrypting traffic, encouraging a few loyal people to apply in private companies sounds like just what NSA needs..