The basic stabilization work was done in American universities (Stanford 2004 to be precise), so I think it is more of a value proposition (mass produced, cheap).
Replying to this thread as a whole. I talked to a General in the army netcom a week after that ban, specifically, I was presenting on the commercial drone market uses. At the time of the ban, the army indicated that they had several thousand DJI drones grounded by that order.