Earlier quoted context omitted.
You are using the exact "reasoning"/propaganda that communist regimes used in Eastern Europe in the past. EVERY dissident who fled to a Western country was automatically labeled a spy.
If you were an Eastern European person who made it into West Berlin with thousands of secret Soviet intelligence documents in the 1960s, then you probably were a spy.
We will never know for sure, but did you watch "Citizen4"? A closer look at Snowden - IMO, it's highly unlikely that he was a spy. It is clear (to me, at least) that he is highly principled, not money-driven. He'd have to be an extremely good actor.