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).