In what case or cases would it benefit to shut the VPS off?

When you fly outside of the sensors limitations so you don't get any false readings.

Is there an altitude in which the VPS doesn't work, or what is its maximum effective height?

Karlos7 Posted at 2017-1-27 11:23
Is there an altitude in which the VPS doesn't work, or what is its maximum effective height?

10 meters.

DJI-Ken Posted at 2017-1-27 10:06
When you fly outside of the sensors limitations so you don't get any false readings.

Maybe you should add also FOG example there. Today vision sensors were going crazy when i tried to fly it over light fog. Fog was not that high so i flew over it quickly but still hearing all kind of sensor warning made me little worry

VIPs shuts off by itself when lighting conditions are not good. It doesn't make sense to think it as shutoff but as on stand by, meaning is still functioning but can't make sense of what it sees.