Firstly, this is not investagitive journalism. It's mere information. Secondly, if a news source reported everything there is to know, then there would be just

Firstly, this is not investagitive journalism. It's mere information. Secondly, if a news source reported everything there is to know, then there would be just one news source. Given the time/spatial constraints not everything that needs to be reported gets reported by a news source. In order to stay relevant, most sources want to be the first to report. If they can also sign exclusivity, then what better deal than that. They promise they will say something, not what they will say.