according to current pool stats you can mine 20 NAUT a day with 1,733 KH/s
A 280X hashes at 700KH/s at roughly 250watt. Lets say 1KWh is $ 0.10, that means u pay $ 0.60 a day.
1,733/700*0.60= $ 1.49
cost of mining NAUT, only electricity included and not the equipment would be 1.49/20= $ 0.074 and current price of writing is $ 0.087
this calculation only applies at current difficulty.
So at this moment at current prices there are miners that believes in NAUT, if not they probably move on. <-- from a miners perspective.
I have tried to stay on top of these calculations too, but the difficulty is out of control swinging back and forth. One hour I am mining at a rate of 20 per day with 1700 KH and the next I am mining at a rate of 40 and the next at a rate of 10. Lol. Of course 2 days ago I was getting only about 7 per day with 1700 KH/s. If you know anyone who is open to mining something in scrypt right now, you may want to ask them to mine NAUT. The multipools appear to be raping this coin at the moment.