To say it is so simple as to just "pull the plug" and all the material the tube sites has becomes OLD is very naive. Do you know how many MEMBERS have downloaded and will continue to DOWNLOAD material from paysites? And HOW do YOU control THEM and make SURE NONE of the material THEY HAVE gets distributed?

Even if all members promised to not give any of their downloads to anyone, there is already so much material floating around that it will continue to satisfy many people.
And as it has been pointed out, so many people prefer amateur material to "produced" material because the guys seem really much more into the sex and thus to a great many people makes it even hotter.

There is so much more involved than just simply having every paysite in the WORLD use g or r rated material in their previews.