I *so* wish I could get the PetSmart shops I used to do in the mid to late 90's... I don't think it had any actual pay, but I did get a free grooming ~ the full-scale, "the works" grooming ~ and I think $5 to make a small purchase. And people who have paid for "the works" grooming knows it's spendy. I got to go every month, I think... or at least every other.
It was absolutely awesome, and I did this for over a year (possibly closer to two) before other work made me too busy to fit in going any more. I had a full-time job, a part-time one, and then mystery shopping now & then. Then I got another, more-steady, better-paying part time job... and since I didn't have my own car and had to get rides to my mystery shops as another down-side, I gave it up. I did the PetSmart and a few other places, all for one company. Oh! And one restaurant for one other company ~ I almost forgot. I had to hand-write the reports and fax them (and the receipts) in. I believe they also had me mail in the hard copies (I think I kept copies for myself, wonder if I still have them?).
They always did a good job with my elderly Sheltie. At first, they didn't do a perfect job trimming her fluffy feet, but I described in detail what they did and what they should have done. And that I knew this because I had been trained to groom Shelties for the show ring. Soon, they were doing it the way I said they should.
I even sent photos of the foot-trimming thing once.
Anyway, the closest thing I've seen in my area is that a couple different farm store chains are shopped, by different MSCs. Both have decent pet sections ~ food, supplies, etc. I love both of them, and will take them whenever I can. They both pay about the same, although it's divided differently... i.e., one is $5 pay with $15 reimbursement, and the other is $15 pay and $5 reimbursement. It makes no difference to me, because the item I get reimbursed I'd absolutely and regularly be buying anyway.
Neither report is that bad, but one is a little more detailed than the other.
Practitioner of the Nerdly Arts.