Since they controlled the publishing, they got away with it.
There is a reason why New York is so pivotal in the broadcasting industry. Broadcasting is a tool to influence government policy, and the broadcasters always influence that policy to keep getting more of Washington DC money to flow through their hands.
Same now as in 1860.
There was more sympathy in NYC for the Confederacy than you would suspect. Joseph Pulitzer, publisher of the New York World, was married to Kate Davis, a cousin of Jefferson Davis.
After Davis’ death in 1889 his widow Varina was asked to be a columnist for the paper and she moved to New York, where as one of the ‘Confederate Carpetbaggers’ she worked for reconciliation of the former enemies, and among her friends was Julia Dent Grant the widow of the General.