I HATE SHOPPERS!!!
And yes, they are real. I don't know if this particular outfit is legit, but it is a legitimate part of the retail industry. There is nothing worse than having a nightmare client piss you off, and just as you are about to go on a 5 minute break to cool off, you see someone who needs help. So, with your now terrible mood, help that person. Later in the week, you learn that this was a shopper.
Anyway, get a list of establishments, and contacts, for referals. Check up on it, and then part with your $40.