A colleague of mine worked Walmart returns desk back during her high school/university days. She said many people would buy all their Christmas decorations early December, then return them early January since Walmart had a very relaxed return policy.
When I was younger, a friend's dad used to run a millinery. We'd sometimes hang out there for half an hour after school and then his dad would take us home by car. I was always amused by that oddly specific sign next to the cash register saying something like "one week return policy, except for black or white hats". Every time I saw that sign my curiosity grew so one day I finally asked his das what was up with that specific exclusion. "Simple" he said. "White hats are for weddings, black hats for funerals. People would return them all the time, the day after the ceremony."
I used to do this with my kids growing up, buy matching size low quality winter shoes at beginning of winter, which can barely last through winter, get refund for broken shoes at the end of warranty, basically free renting if you are willing to risk shoes will get broken already during winter. Since I have 2 kids I don't care that much about it, if it gets broken great, can get money back and buy new shoes next time for same kid or use it for other kid, if it doesn't break, other kid can use them when they will grow up.
When I was in college, I had friends that would buy games for the computer and return them to Walmart when they finished them. TBH some of those games were a scam. You could finish them in six hours. I didn't feel sorry for Walmart in those cases.