“What is necessary is that the tortious act must be done with guilty knowledge for the motive that the chances of economic advantage outweigh the chances of economic, or perhaps physical, penalty.”
“There must have been evidence which would have entitled the jury, after due directions, to find: (a) that the defendants knew the article complained of to be defamatory or were reckless whether it was so or not; and (b) that they published because they took the view that it would, in a broad sense, pay them to publish and risk the consequences of any action the [claimants] might take.”