Some places like Costco - yes.

Other places have them priced high enough that I think they make money on them.

(The trick is they take the unsold ones and strip the meat off and sell it in the deli/sandwiches.)

It's a good way for a grocer to minimize waste. When raw chicken gets close to sell by date, turn it into rotisserie chicken, when it doesn't sell - turn it into sandwiches and other products.

My kids just remarked to me that a Costco rotisserie chicken was $4. I didn't believe them but I do now. I wonder how freezing that will thaw. That's a cheap food option.