The distribution technology relies on someone uploading as they simultaneously download.
This works because the incentive to upload is that you'll get a file for free.
Why on earth would I (or anyone else) use (actually I would say "waste") my upstream bandwidth so someone can *charge* me to download a file? Especially when it is almost certainly going to have limitations on how it can be used (perhaps it will expire, it can only be played on the machine where it was downloaded, etc.)
