You're right, and nobody is saying they should have less sex, plenty of people have lots of sex. I think it's more about the performance nature of it, and the deliberate permanent nudity, it stops seeming like real life. You also have to consider that yes lot's of people who just want to see porn like this will sign up, but there are a lot of fans of voyeurism who don't sign up and they would if it felt more like that. A true voyeur feeling website would make lot's of $$$ too, especially when you consider that nobody is truly catering for that. I think it's the fault of people who don't particularly care about voyeurism, they come to the website and complain that there isn't enough porn going on, so the website owners feel pressure to "make stuff happen", but then you lose the voyeurism completely.
I love VHTV there is lot's which is good to see, but I still am here hoping for a website with the amount of content and participants and quality of service and is also really voyeuristic. At least VHTV has shown the way in terms of how to provide the service with so many cams, replay and moments. Hopefully one day someone will take this same model and apply it to something which really feels voyeuristic too, there are lots of us who would love to see that happen.