This is still pretty misleading. TPB only hosts the .torrent file, they don't have any of the contents of the files being shared. They don't even run a tracker anymore! Any method of distributing a small file to a large number of people would have worked in the exact same way. The only thing TPB has that (e.g.) Google Docs doesn't is mindshare.
The .torrent file can list multiple trackers. If it includes TPB's old trackers, connections will fail but the DHT and other trackers usually manage just fine. In fact, TPB said that trackers are obsolete ("not up-to-date") and that everyone should just use DHT and peer exchange (PEX) instead of relying on centralized trackers from now on. Some people still use trackers, but it's not really necessary.
