You can definitely out-eat DNP's metabolic effects, so yeah there's no magic about it.
When you lower calories, you slow your metabolism. Over time, your weight equalizes at a lower caloric intake and lower metabolic rate and you are primed for fat gain.
DNP raises your metabolism by increasing expenditure. Over time, your weight continues to drop because your body simply cannot compensate by dropping metabolism far enough to match DNP's expenditure increase on a moderate calorie intake. Your equilibrium point will be lower, and your metabolic slowdown less than caloric restriction alone.