I agree with some that are saying it is to increase market share. If the car has a 10 year warranty, that means they just may hold onto that car for ten years. If at the end of those ten years (or even before that) and they need another car either for themselves, or maybe their children, and they found the car reliable as well as the customer service, then what do you think they will buy. I'm a strong believer in that most people will buy a vehilcle of the same make if they found the experience pleasing enough. It doesn't have to be perfect, just good enough that putting up with a few problems here and there are not big issues.
My father's purchased american cars and I was raised on them Oldsmobile was what he always bought. It was also my first car. What happened even after my car burned up (spontaneous combustion

)? I to bought an oldsmobile. Of course there were incentives to do so. But kia, daewoo, etc are in the business of building market share. Daewoo has lost so much money that they have the debt of some small countries (i think they surpass israel). But in order for any company to get a foot in the door, they need to sell at a low profit, or for no profit.
Thake AMD for example. In order to build market share, they were welling 486 chips at cost. Why? Well they could then take this money and fund their research for faster chips (which they have done a great job). but even though they have good market share, they still undercut intel pricing in order to continue to build market share.
I would love to go and test drive the new hyundai. I've heard really good thigns about it and for the money, all those extra options? How can you beat it? Also with a ten year warranty, would you rather get the base civic or loaded hyundai/daewoo for the same price?