There have been several shops I have done that I expected the client was "shopping" the MSP for customers among the shoppers rather than the other way around
Certainly there are a lot of shoe shops around here that require expensive shoes and are set up as P/R but if you choose not to return the lovely shoes you bought (and not off the sale or clearance rack) it is ok and there is an optional way of dealing with that part of the report. There are restaurants that reimburse for about one person while requiring purchases for two (and buy one get one free entrees are often done down here without being shops). I think my biggest surprise was after doing a ludicrously overpriced mattress shop, whose emphasis was to "determine" that no discounting was taking place, the last half of the report was MY demographics etc. I thoroughly expected the mailbox to begin filling and the phone to start ringing with "special offers" for mattresses. Surprisingly, that has not happened. The Eyeglass shops do more expensive retailers where there is no reason to believe that the quality of the optics is any better or worse than the "optical outlet" joint down the street that is 25% of the price. On the eyeglass shops, some offer a 10% discount through the MSP if you purchase glasses during your visit (but don't use your vision insurance), some of them allow you to use any coupons you can find and even direct you to the client website for $100 off coupons, but they still don't get down to the price of the "optical outlet" down the street.
Funny story about the optical shops. Last time around we took the eye exam one and got boyfriend's eyes examined. He then duly picked his frames and the best price we could get was $275 for one pair, from which they would deduct the cost of the eye exam. So with the 10% MSP discount and reimbursement for the eye exam, the glasses would have been around $190, but they were specific about not mentioning or using vision insurance, though I suspect we could have submitted the bill to them for reimbursement. "Decided" not to buy and ended the official visit with no purchase except the reimbursable eye exam.
Wandered down the mall and came back a half hour later to ask if they price matched their competitors. They did. Using a buy one get one ad and a base price of $79 for "any frame, single vision lens" we got the upgrades wanted and the total came to $135 because they wouldn't reimburse the eye exam with this deal. Submitted it to the vision insurance, which covers up to $250 for exam plus glasses every other year and so were out of pocket nothing for the two pairs of glasses plus eye exam and then got reimbursed $65 for the eye exam by the MSP.