In my experience they tend to be only slightly profitable INITIALLY. On the other hand when they come back and flood the used market they definitely decrease residuals and we all know what that means. When examining the business case for fleet sales LOOK AT THE WHOLE LIFECYCLE including the implications of decreased residual values two years from now.
The Fusion's residuals are increasing now because the decision was made two years ago to cut way back on fleet sales. How many more times will we see this cycle?