I'm very angry about this and going to try to be careful to not reveal too many details. Don't think any labor laws or rules have been broken. Just a heinous insult.
My wife is a barista at a coffee shop in a grocery store. Co worker had to call out sick and my wife was the only employee left. Was told to stay and man it until the next shift takes over (~5ish hours).
She was compensated with a $3 coupon to the grocery store. Like I get bad day/bad luck but for the place to provide a $3 coupon is plain insulting.