The device on the first sketch is intermittent. In the second sketch there is only one pulling side, so that the daughter kites work alternatively.
However the return phase of the device on the first sketch could be in yoyo mode by implementing winches which would work during the return phase while the pulling-cable is rolled up, then the reel-in phase occurs while the two kites are already in the initial position for the next cycle. That stays intermittent but at least for a shorter time, the energy being expended only for winding the pulling-cable, and also the tethers for this variant I propose.
At least this system allows to understand better the lack of efficiency of both yoyo and flygen modes compared to wind turbines.