So you want pricing like -
x - user can download 1 movie per month
x*2 - user can download 3 movies per month
x*3 - user can download 5 Movies per month
Is this the structure you are looking for? We have one partner that is building out a site similar to this. The logic is on the web side. It is not trivial, but we can help your team or put you in contact with designers that have already tackled any of these issues.
We don't create the websites, but we do handle the DRM, compression, and delivery. If you have any questions IM me
AIM - DivXVOD
ICQ - 3370081
In case you want to see some websites out there using DivX outside of the PPV model:
www.blue-views.com (rolling out a 'members' program similar to above)
www.bosomquest.com (memberships to each set and checks against fraud or misuse)
www.lionsdengold.com (token system)