1. If the content is uploaded by the people who own the site, aren't they already in violation of DMCA?
A: Yes, but try and prove they uploaded it. That's the hard part.
2. How are you supposed to sell something you've already given away?
A: You can't.
3. Can porn ever go ad supported and just be 100% free?
A: Yes, however the product models may need to change. Paysites would probably move to being more "Pay Per" than "Subscriptions".
4. How do you feel about tube sites that use stolen content to feed the "premium" members areas?
A: Premium Tube Site Password Trading Sites????
5. Will they be the death of our business?
A: No