I wonder if a better model for journalism is the model employed by Hindenburg Research. They find stories that when published will have a devastating impact on a company, short the company, then drop their research and reap the change in market conditions. For everything there isn't a market for prediction markets and side-effects on other assets might make up the gap.

The way I see it, this would require these publications to be truthful about their reporting, if it was revealed they weren't the market would no longer react as strongly to their signals.