Consider something. Let's use Trump as an example, since the discussion of 'why aren't they releasing stuff on [the other side]' is generally connected to him. Imagine somebody had a treasure trove of leaked and compromising information on Trump. And they then submitted this information to Wikileaks. As the weeks and months passed by, it became clear to them that Wikileaks was not going to publish this information. Do you think they would not submit this to other media outlets? US media outlets would do absolutely anything for this sort of information.
I'm curious to see where my logic may be failing me.