I m not sure i follow. Substack exists for 4 years. Why wouldn't e.g. greenwald break a big story, like he did before? Also what incentive did WSJ have to break

I m not sure i follow. Substack exists for 4 years. Why wouldn't e.g. greenwald break a big story, like he did before? Also what incentive did WSJ have to break the Theranos story? Both WSJ and nytimes had written accolades about Theranos in the past and, of course, certain lies. Do they have some kind of monopoly to the truth?