I wonder if there's a viable market for a news outlet which has as its distinguishing core principle the guarantee that it will never use any material from press releases (or equivalently unsolicited, self-interested messaging) as unqualified sources, except for narrow cases when no other source was available. And in such cases it is accompanied by an unambiguous indication (really unambiguous, like a different color font for any portions of the article text directly and solely derived from such sources) that the information presented therein should be trusted on the same level as motivated hearsay from a single source, because that's what it is.

But of course this would be expensive to operate, difficult to insulate from corruption and compromise, and unlikely to be popular with advertisers, whose objectives constitute the epitome of conflicted interest with such an outlet's stated core principle.