I think it's a flood strategy. Most of the general public doesn't have the attention span to sift through literally millions of files of what amounts to raw intelligence and do the analysis, and the hapsburg-jawed nepobabies that call themselves "journalists" are too craven and/or incompetent to do it.
It'll make its way out in time, but I'm guessing the oligarchs, in true corporate raider fashion, have told themselves "I'll be long gone by then"