Yeah, there has got to be someone with access to some cheap or free servers mining this. NUD is getting okay volume on bittrex, but it all comes it spurts. Even though I don't use c-cex, I noticed this happening over there too. NUD can be quiet for hours, and then someone comes along and dumps 15-20k all at once. I can't be the only one who has noticed this. There are 28.8k NUD mined daily, so whoever it is represents a large portion of the total network. If no one comes up with an external miner soon, NUD is gonna get dumped into the dirt.
Guess it's not all bad though. The price isn't that important at this stage, and if NUD wanted to live in the 1000-3000 satoshi range for a while, I will gladly scoop up those daily dumps.