One of the original reasons that Bittorrent clients started sending encrypted data was to get around ISP packet inspection that tried to throttle torrents. That

One of the original reasons that Bittorrent clients started sending encrypted data was to get around ISP packet inspection that tried to throttle torrents. That worked for a while, until ISPs started throttling based on torrent-like transfer patterns. That wasn't a single regional ISP; it was a pretty common behavior. It's also something that would be fixed by either having a range of different ISPs available in a region, or enforcing net neutrality (in the sense of treating data as an opaque payload to be delivered).