I read a while ago about a supercomputer being used for Doge mining, it wasn't very good, I beleive better than a good GPU, but nothing special, not worth wasting supercomputer time for anyway!
Last time I mined Doge with CPU I got for a day of mining less than what I get from a faucet in one visit.
But there was some exploit for Synology NAS that installed Dogecoin miners and the hacker got some bucks at that point (lower diff, higher Doge, higher BTC). I don't have the patience to search for that news, it's about 8-10 months old, I think.
So basically if you chose the right coin, this can work.
It's a shame that uTorrent actually does this - with or without an EULA.
But could you imagine with say 1 million cpu's all running at once? They might be able to make a fair bit from that, also I don't think this was utorrent itself.