What happens when a VOR gets saturated
VOR beacons simply transmit their signals. They do not actually interact with the aircraft that are receiving these signals, so VOR cannot become saturated.
The question probably relates to DME.
DME stations must respond to interrogation signals from aircraft. Each station has the capacity to respomd to interrogations from up to 100 aircraft simultaneously. If more than 100 aircraft attempt to interrogate a DME at the same time, the DME will becomes saturated. It will then reduce its gain setting, so that it receives and responds to only the 100 strongest interrogation signals.
Polar Stereographic charts are orthomorphic.