There is a merchandising shop at Lowes that I believe you are talking about. There are also Walmart locations.
I did one Walmart location. You had to notify the employees you are a vendor. The Walmart I did didn't need me to sign in. I then had to find a manager for the department I was to put stickers on a product. The product was incorrectly labeled in the current packaging. Two stickers covered claims and a third sticker changed the SKU.
The employee needed to check if there were any other items in the stockroom that you would have to sticker.
In the report it asks how long you are in the store. After I put 20 minutes in the report, I then realized it was $10 per hour with any time over an hour being verified via security cameras. I've got extra stickers but I refuse to do any more of them for $10 an hour.
I haven't been paid for this report, but I'm thinking I'll only be paid $3 for the 20 minutes I put in the report.