Mining may not be profitable for the person paying 15 cents or more per KWh, but someone has added over 30 petahash since the last difficulty change, that's over 2,000 terrahash of miners every day.  This is getting towards adding something close to the equivalent of 80,000 S3s in 2 weeks.   I don't think they are doing it for love.  

Someone certainly thinks mining is still profitable.