If there's a high demand then there's also a high offer, that's just how bittorrent works, usually… What could be happening is that other peers in your swarm have a higher upstream bandwidth, which would make them preferable seeders, and in this case you would only seed when these preferable seeders wouldn't be connected in a given moment.

I know this is an old post but ive had this problem a few times before… and for some reason when i turn my VPN on the category dropdown shows up again. im in australia and i know the government has blocked all torrent and illegal streaming sites here but dont know if that has anything to do with it but using a VPN is the only way i get the category dropdown to work.