batches are a lot easier to keep reseeded than individual episodes. Think of it in light of episode count versus torrent count ....

Animeone has released nearly 800 fansubs now. Out of those, a good portion are things we'd rather not maintain torrents on (older licensed stuff, and stuff that was before the bittorrent age). But a LOT of releases have rolled across gotwoot. We try to keep some stuff seeded, and a lot of community seeding is done, but .... it's a lot more productive (memory and bandwidth-wise) for a seeder to seed a popular batch than it is to have a seeder seed single less-popular files. It also makes it less of a management task to try to download the stuff for you, 'cause you only have like 7 or 8 batches to get, instead of 80something for the series. You can more reasonably start a batch (or two) and expect it to be there tomorrow, ya know?

Batches are good mojo, especially relatively popular batches.