As with any complicated situation, there are multiple conflicting interpretations that could be possible. Since we can't collapse the uncertainty, we must take the grain of salt.

I do generally trust Snowden, but I can't deny that Russia would likely do everything they could to leverage the information he has against the US. Has he given them NatSec secrets in return for asylum? Unlikely I think, but possible.

IMO, Russia is just keeping Snowden around as a general anti-US voice in the global conversation to air credible dirty laundry of their biggest rival. As an honest patriot, I welcome the tough criticism and aspire to fix the problems he highlights. But it's a fair concern that some of that is potentially embellished or selectively censored for Russian propoganda purposes.

I'm not sure what you're suggesting here? Snowden has definitely been pushed into a corner, which benefits multiple entities, but I'm not clear on which particular view of events you're talking about - can you elaborate?