Snowden's the small fry who, if he will "flip" -- turn himself in -- will trip up the bigger fish.
What are you even talking about? To reiterate, Snowden's actions clearly don't suggest that he was in any way acting as an accomplice for an entity other than the general international public, and nothing beyond pointless speculation can be inferred from his temporary residence in Russia. There isn't a "bigger fish" in Snowden's case, as far as all available evidence
and the admission of the US government itself is concerned. In the eyes of the NSA, he
is the "big fish." Pointing out a single method used to occasionally bust drug kingpins simply isn't relevant or applicable at all in Snowden's case.
There's also a misconception you have with respect to the nature of Snowden's acts. A distinction exists between espionage, which entails clandestine activities for an entity that typically involve illicitly obtaining information, and
whistleblowing. Snowden had access to such information through a broad, valid security clearance that he used to expose wrongdoings in the public interest; thus, he didn't "illegally obtain" information that he already had access to -- he illegally distributed it. Distribution is another matter entirely, and hence, referring to his actions as a manifestation of espionage is both erroneous and superfluous, albeit vaguely applicable in your defense in light of the overtly broad and arguably quite arbitrary 1917 Espionage Act. Snowden didn't automatically become a "spy" after deciding leak incriminating information -- he became a whistleblower.