You pay them a stipend for their time.
Doesn’t have to be anything crazy.
But they’re at every game, dressed and ready to go just in case they are needed.

That’s still not the NHL we live with today.
Dietz didn’t find out until around 5:50 that he’d be needed for the game.
The place is in the middle of nowhere and there’s only like one way in or out.
But that would make too much sense.
So he hops out of the car, grabs his gear, and starts to haul ass.
Eventually he got to the rink, signed his pro-tryout contract, and received his Sens jersey.
So he just had to sit in a dressing room all night by himself like Steven Glansburg.