ya these warranties are a great revenue generator for them is all. since buying my first new car in 1967 I have never paid extra for a warranty and have never had any problems not covered by the factory provided warranty. I have known friends over the years that own dealerships and so I know plenty of the things they do to increase revenue. if you sign up for several thousand of extended warranties and then make a bunch of mods to the vehicle yourself, you are just shooting yourself in the foot.