I think they only have up to one year prior to the current month seeded, if I remember correctly. I'd be a little surprised if no one else was seeding, but it's possible (I've never had to go to torrents; 2 hours, six days a week is more than enough for me).
Members of their AMP program get high quality archives (not sure how far back, though), as well as any classic archives they post on the AMP-only forum. It's only $3 a month, if you are so inclined. You can probably find out all you'd want to know and more by sending an email to ian@freetalklive.com