Snowden might be a Sealand double agent for all I know, the point is: were his revelations made up or he spit the truth? The truth is way more damaging of course. Well, a strange kind of damage. Knowing about the excesses of surveillance state is a benefit to the people and does not hinder in any way the agencies to keep doing what they do, because they always de facto operate above the law in every place. So you have a double agent aiding the enemy. Hmmm?
Besides... If there had been the hint of the smell of a convoluted link between snowden and russians, it would have been all over the news in an attempt of damage control.