Well I think this is more to do with Russia thumbing it's nose at the US rather than protecting an individual from tyranny. But fair play to Snowden, it's good news for him. But If I were Snowden, I'd be quietly sneaking out of Russia very soon lest the political winds change and he suddenly finds he's a very valuable pawn in a very dangerous game that he can't win.
He's already a pawn in a game he can't win. He will have to clear all of his actions with FSB from now on.
That's an over-simplistic view of things and implies that Snowden is perforce the lesser fool. I think it's rather more the reality that Snowden has been quite wise in his planning: he is aware that he is putting Russia in a position where Russia will try its darndest to be on its best behavior in sustaining that "asylum-giving, human-rights protecting" image it has recently gotten.