What makes it beneficial for ripping/distribution groups to coordinate like this? I've previously seen them agree on a common standard for the number and size of rar files a release is to be broken up into, and other things i can't remember the specifics of. Why do they do it?
From reading many of the curiously well-informed comments, I suspect that the reason for standardization has to do with speed and validation for credit. Since it sounds like "scene" people arbitrage new releases across scene FTP drop sites for upload credit, a standard method of "settling accounts" via scripts/bots would be useful. Arbitrage would be less efficient if files had to be transcoded between FTP sites.
PS: About time with dropping xvid for h264.