I don't think anywhere else is quite as dramatic as Costco but I kind of feel like most places that have rotisserie chickens use them as a loss-leader. At any grocery store around me they cost about the same or less than a raw chicken.

They're kind of perfect for it. It's not hard to rub down a chicken with some spice blend and skewer it on a rotisserie, not much else needs to be done there.

And if you're a grocery store you're selling chickens anyway. You always have them on-hand, you can rotate out stock that's getting close to expiring by just throwing it on the rotisserie.

And for someone who just needs a quick dinner, it gets them in the door. Grab the chicken and a couple quick side dishes and you're in business.

There hasn't been one around me in a while, but Boston Market's whole thing is/was pretty much rotisserie chicken, and at least the last time I went to one (probably a decade ago) I remember them running some kind of special that got me like 2 or 3 whole chickens for some ridiculously low price, but of course I also got a few tides with it and I feel like that's where they made their money.