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BitTorrent is No Longer the ‘King’ of Upstream Internet Traffic
(torrentfreak.com)
This is a most excellent place for technology news and articles.
uTorrent sold out, its decline is not only due to BitTorrent becoming less popular, but also because what was once a very thin client at one point was bundled with malware so a lot of people kept using old versions or switched to clients like qBitTorrent