“DNAinfo is, at the end of the day, a business, and businesses need to be economically successful if they are to endure.” And with that, Joe Ricketts, the billionaire owner of several small but influential news sites, announced that he would be shutting them all down. The move came a week after employees at those sites decided to unionize. We often get excited when a billionaire swoops in to save a news organization. But it can be a dangerous game.