oh, for those wondering who might do these shops - a parent with kids in sports!
I don't like to work for reimbursement only, especially $10 at a store I know won't have anything within that amount, but I can see where someone might take it and consider it a "discount" on a purchase that they are going to make anyway.
I do try to hit up my local thrift store or Play It Again Sports for some of my kids' equipment like a pair of football practice pants, but if my daughter needs running shoes for cross country or track, that's not something I would get used.