As for performing continuous low radius loops. With no control, the kite descends slowly, turning and pulling relatively hard despite the small radius of the loop. Then the kite has to go back up and the cycle starts again. It is also possible to raise the kite a little with each turn so that it maintains its altitude, but this can lead to a cyclical slowdown.
In addition to the possible advantage of a constant speed during several revolutions, the kite is closer to the center of the flight window where the traction is higher, and throughout the loop. But a swivel is required.