Although movie files are gargantuan compared to software applications, it's easy to see that their digital distribution will become faster over time. Large caching routers expressly designed for movie mirroring could be deployed to keep overall bandwidth unsaturated. For music, artists could produce albums, and use select singles and reviews to demonstrate their quality. After payvoting, the entire album is released. For open source, rating by one or more programmers would be necessary.
Source code can be technically open, but obsfucated to the point of unreadability.
The critiquing programmers would casually read the code, and qualify its communicativeness. The two C code fragments below are computationally equal, but one is in a more desirable form than the other. Adjust the current levels of an array of voltages, and reset their adjustment values to zero. The single biggest obstacle to payvoting is that not enough people will vote. I expect that to be the case starting out, but to become less of an issue over time as the idea takes hold.