Parksseems here in Ontario the Provincial Park system is trying to monitor user numbers to limit crowding. They check you in manually when you arrive but don't seem to have any way to monitor who is leaving. A licence camera at the main gate and at the exit would probably work. I wonder if GSI would be interested in getting into that area or not? May also work at other attractions, shopping malls, big box stores as well. The data would certainly be of interest for planning purposes. Might not be an issue if and when covid19 ever comes to an end or maybe its just too small of a niche market.