[Tcoat]

To add to this^^^
When guys like us think Mustang, Camaro, Challenger, etc we tend to think of the top of the line, high horse powered, race speced machines. These are not the bulk of those cars that are made by a long shot. The vast majority of such cars are the bottom of the line, looks like the performance model and are bought by somebody that just wants the looks and will never, ever, ever even drive that version at half of it's capacity much less want more from them. These are the versions that the companies make money on. Ya, the performance models cost more but they also have a much lower margin than the low end versions since they cost a whole lot more to produce.
When you look at something like the Mustang Shelby GT you are probably looking at 1% or less of the production and if Ford was relying on them for profit then they would be in serious trouble. What they are relying on is that people see them and think "ooooh Mustangs are cool" and then run out and buy the much cheaper but more profitable base.