It seems the general consensus is most forum members consider mystery shopping a business instead of a hobby or a way to occupy our time.
Whenever you find ads for mystery shoppers they often exclaim how you can shop or eat for free as if there is no difference between this and how you go about your normal day. Reimbursements are necessary because we cannot evaluate aspects of the service without a purchase.
Companies almost always consider the purchase to be an added value for the shopper when often it is nothing more than a PITA to get a receipt for POV. Sometimes the reimbursements do add value although whether they do and whether it is equivalent to the value placed on it by the client and MSC is not always the same. A good example would be the now defunct McDonald's shops. Shoppers were required to purchase two meals, but also complete the shop alone. Unless the shopper lived or worked nearby and had someone to take the food to on completing the shop, the value was only in one of those meals.
Equal rights for others does not mean fewer rights for you. It's not pie.
"I prefer someone who burns the flag and then wraps themselves up in the Constitution over someone who burns the Constitution and then wraps themselves up in the flag." -Molly Ivins
Never try to teach a pig to sing. It's a waste of your time and it really annoys the pig.