The little mom-and-pop video rental/store down the road from me buys videos from Blockbuster and other Chains which over-stock during initial release and then sell off copies as demand drops...
I'd be shocked if they maintain any sort of database on the stars of each movie rented and draft residual checks to send off every week. For that matter, I doubt that even Blockbuster does this. So "lowbridge's" explanation that the stars only derive direct residual profit from the initial point-of-sale makes some sense to me.