... Robert Baer, a former senior CIA official, told the Mail that the fact Snowden had ended up in Russia was a likely sign that Moscow had signed him up when he was working for the spy agency in Geneva ...

The US stripped him of his passport while he was at the airport in Russia, and even forced down a plane they thought might have been trying to get him out of Russia. Of course he 'ended up' in Russia, that's where you wanted him if you couldn't get him back. Probably so people could push this very narrative as a means to discredit him.

... Edward Snowden's passport was annulled before he left Hong Kong for Russia and while that could complicate his travel plans, the lack of a passport alone could not thwart his plans ... If a senior official in another country or with an airline orders it, a country could overlook the withdrawn passport, the official said ...
NSA leaker Snowden's passport revoked
By MATTHEW V. LEE
Jun. 23, 2013 5:19 PM EDT

... The president, speaking to the Guardian at the presidential palace in Quito, said his government did not intentionally help Snowden travel from Hong Kong to Moscow with a temporary travel pass. "It was a mistake on our part," he added ... He said the temporary travel document issued by his London consul on 22 June – and publicly disowned five days later — was a blunder ...
President Of Ecuador: We Helped Snowden Leave Hong Kong By Mistake
Rory Carroll, The Guardian
Jul. 1, 2013, 9:31 PM

he would still be in Hawaii, spying for Russia. Nobody was looking for him, they did not even know he had left the island. Would Russia burn an agent who had all the keys to the kingdom?

Maybe (say) a big flashy leak is wanted merely for its propaganda value -- or maybe it is intended to misdirect attention away from another spy

There are lots of possibilities

We might a well just publish it all ourselves.