I think the appeal with that is the "personal" touch. Porn is more interactive these days, you can actually have conversations with the women you're jerking off over. It's live and she's doing it for you. It's digital prostitution for her, and for him he feels like he has a relationship of sorts with the girl. If you're wealthy and lonely maybe you like giving money to an attractive girl who will finger herself in gratitude.

We've come a long way since I was a kid when porn was a jizz stained magazine dumped behind a bush.