I haven't had time to have a proper look at it but it appears they were only using the top movie list and aren't anymore.
I bring it up on the basis that the ease of use goal would rely on being able to nearly always download the correct torrent(non fake) and using only the top movies list or a rule on number of seeders may limit the catalogue. I guess they could also use a trusted contributor list if they wanted to allow for a more general list of movies in the case that YTS is not as resilient (for whatever) reason as the pirate bay.