Of course.

Rotisserie Chicken is a loss-leader. But that smell stimulates your appetite and gets you to buy more.

Plus you're gonna want some high-margin foods to go with it. Maybe some veggies, potatoes. Box mash is a pain in the ass when the chicken is already cooked, may as well get the pre-made heat-and-eat stuff. It's right here next to the chickens...

Plus if you get box mash you need to get milk and butter too...and walk nearly the entire rest of the store to get all three.

This is basic supermarket psychology.