It's a similar phenomenon to the "post-Hilary" world of the Wikileaks email docs. People assume there was hard evidence proving a criminal conspiracy by the DNC to rig the election somewhere in there... mostly because that's what other people told them. Not because they've bothered to look.
People's cynicism has led them to put more trust in the metafictional reality of leaks than actual reality. Which, ironically, makes them easier to manipulate even as they believe themselves to be somehow above indoctrination and control having reached enlightenment through the "Snowden revelations."