I wonder if society should step in to prevent those men from getting hooked. We already step in to prevent people getting hooked on physical drugs because the negative externalities are too bad to accept. But this sounds like people getting hooked mentally will also have pretty bad side-effects for society as a whole.

I mean imagine some guy "falling in love" with a model this way. And then after a year and $10k in "voluntary gifts", the poor guy figures out that he's the sucker and he has been milked by scammers and he never actually talked to his "girlfriend". Do you expect that person to go back and have a healthy relationship with women afterwards? Or is he going to go off the deep end and become misogynistic? You can't put all the blame only on him after that experience. He might need therapy and rehab afterwards, just like a recovering drug addict.