There's some kind of furniture store near my office that is closing down. And I swear they have a sign in one window that says, "RENTAL RUG BLOWOUT".
Now, I've accepted used rugs before, from family members who didn't have pets in the house. But...I'm trying to imagine if there are ANY circumstances under which I would purchase a used rental rug for either my home or my workplace. I'm sure they clean them first, but at my last job, a co-worker once laid a piece of popcorn in plain sight by a wall to test how well the janitorial staff swept the carpet. After 6 weeks, we couldn't stand to look at it anymore, and threw it away ourselves. So I just imagine what kind of material is probably ground into those rental rugs, and shudder.