Unfortunately, like everything else, the fine print ruins it. The tallow is loaded with some kind of additive that keeps it liquid at room temperature, and the fries are only "finished" in this tallow at the restaurant.
Discussion
Yes, discovered this more recently. The potatoes are previously processed in seed oils by the distributer that Steak'n Shake buys them from.
Baby steps. Overton window moving in the right direction.
For now, I'm sticking with homemade tallow fries using clean ingredients.