This seems very much like a solution in search of a problem.
My friends and I independently came up with this exact idea at the most recent regional burn event, specifically to better coordinate meeting back up after wandering, and then discovered this device, so it's very much a real problem in need of solving.
Concerts are usually pretty easy to find your friends after splitting up. They are usually at the bar, restrooms, or a handful of viewing spots or seats. Big raves, music festies, burns, and other large gatherings are spread over a much wider area.
It's also very confusing for a person who isn't very direction savvy. For this reason alone, I'm definitely going to look into these compasses.
1. Find My networks are great when you're trying to find a thing 2. Totem-style GPS-based devices are great when you're trying to find a person who might be able to react to a ping
The problem I think Totem has is that the use case is pretty limited and the cost per unit is probably pretty high. It's basically the inverse product of Yondr[1], which also has a pretty high cost for what it does. As a parent of three, and also as a dad who regularly travels with tween/teen soccer teams, have an easy way to interactively track kids would be very helpful sometimes. I see Totem as a highly feature-reduced Garmin InReach but with a much more intuitive UX for the singular use case it serves.