Question: Who broke the Biogenesis story about A-Rod doping in baseball?
Question: Who broke the John Edwards mistress story?
Question: Who broke the Dan Rather fake documents story?
Question: Who broke the Monica Lewinsky/Bill Clinton story?
Places/publications that were not mainstream. Just because the source may be a smaller publication without much readership doesn't make it any less true.
Question: Who broke a billion other news stories?
Places that were mainstream. But please, continue with your false equivalence: I'm sure both types of sources have equal track records of accuracy, are totally valid and we should always give them both equal benefit of the doubt!