1. yes - i did it myself and it worked well. the only catch is there will often be a few members who recognize the models from other sites.

2. not usually. i have seen limited time licenses a few times in the last 12+ years, but very rarely.

3. in most cases, yes.

4. no, although if you go with a pornstar site, crediting the models by actual pornstar name, it may be helpful to credit famous studios or directors.

5. nope.

6. yes. in fact, there are many sites that sell and retain great that have no original content at all.