I stumbled across this thread and had to create an account and comment.

After years of working in contractual and license media production, we decided to take a spin at the "impossible" co-op policy you mention here. We address most the marketplace problems you list in this thread in our own policies at Nimia.  

Nimia is made by and for producers, but the business wouldn't be possible without our team of IP, CS, and marketing ninjas. We have a rock star team here and we're working hard on tailoring our application and policies to the needs of the community. Nimia co-op, NMG, has a board of directors that is currently filled with directors, producers, technologists, a marketing director, and an IP specialist. 

The Nimia application is in private beta, but we are already working with some extraordinary producers. We have the technology in place to manage still imagery, but we are focused on motion picture content at this time. 

I don't want to litter this thread with all of the great benefits of Nimia and our group. If you are interested in learning more, feel free to reach out to us or browse our beta blog. We love comments, criticisms, and questions.

Cheers,
Zach
news.nimia.com