Those who did pizza shops where "beauty was in the eye of the beholder" and would not pay because allegedly the picture of the pizza was fuzzy, out of frame, etc, I believe those shops were used.
The Sweetish furniture dealer that asks over 100 questions, some of them ambiguous because they use items you are looking for as props in other departments and if you see the item in the wrong department and report on it they invalidate the shop probably uses the shoppers work product.
Some guidelines require a shopper to get a business card. Some companies over shop their locations. Car dealers and cell phone shops have sales people that work on commission. They work in rotation if other salespeople are on the same shift. They do not want to waste a rotation attempting to sell a car or cell phone to a mystery shopper...
Some salespeople will give their business card without asking. Some will give the business card when I ask for it so I can write the information they will give me and I will know who gave me the information. Some salespeople will tell me the company does not give the salespeople business cards, some will tell me they left their business cards in their other pants. If I am not on a shop I go looking for a manager and ask for another salesperson who can give me a business card so I know who gave me what information when I am ready to make a purchase. I ask salespeople for their best and final price and how long it is good for.
If I am on a shop I perform the shop even if the salesperson does not give me a business card. Those shops that have guidelines requiring i obtain a business card or the shop is invalidated will be shopped as I am already there. I contact the scheduler BEFORE I waste time with the survey. I tell the scheduler I performed the shop. The shop is invalid as the guidelines require I get a business card or the shop is invalid. Therefore there is no reason why I would waste time sending information unless I get an e-mail saying the client or MSC will pay my fee if I report as I should not be penalized by the nonperformance of the client's employee. Unless I get an e-mail accepting my terms, there is no reason to send a report. The guidelines say I will not be paid and I do not work for free.
If the MSC threatens to penalize me because an employee failed to perform I do not work for that company again. They can find some other sucker that will send a report knowing the shop is invalid because a business card was not obtained. The client knows which employees were scheduled and knows who took my information there is no need to obtain a business card. You know which MSC's to work for and which participate in the scam.
You can have everything in life you want if you will just help enough other people get what they want ..Zig Zigler