I'm not blaming the victim, but don't play the 'look what you made me do' game. Making content accessible to anyone (even behind a paywall) is a risk they need to take nevertheless. It's impossible to know upfront if the content is used for consumption or to create derived products (e.g. write an article in NYT style etc.). If this was a newspaper, this would be equivalent to scanning paper and then training AI. You can't prevent scanning, as the process is based on exactly the same phenomenon what makes your eyes see, iow information being sent and received. The game was lost before it even started.