Its different but a way for the MSC to get shoppers read the guidelines. The only time it might be challenging to find is if a shopper did not read "all" of the guidelines and then went searching for the code. That would be like one of those pictures with 500 frogs in it and you have to find the one that is different.
I did one of these shops in May. Don't know that I would do one every month, but there is no cash outlay and I got quite a lucrative bonus (3x). My crystal ball says I'll be reading the guidelines, finding a code, and handwriting a 11-page report in my future.