So you have some large files you'd like to distribute. Maybe you're the author (or compiler) of a custom distribution of Linux. Or maybe you make videos, and you'd like to allow people to download MP4 files to watch off line. What better way than using BitTorrent for this? It's distributed, it's fast, it's easy to manage.
And what better system to use than Transmission, the default BitTorrent client that comes with most versions of Linux?