But not everybody qualifies. You have to be at least 18 years old, have a drivers license, and have a good driving record. You pay for insurance and, in some cases, for maintenance, especially if you drive your own car.
On top of that, only certain people who drive a lot of miles, preferably to densely populated areas, or to specific areas, get chosen. If you satisfy those requirements, hop into the bandwagon.
Alternatively, you can have your own car "wrapped" in an easily-removable paint-safe vinyl film that contains an attractive graphic ad. That ad promotes a client company's product or service. You get paid to do so, depending on the amount of miles that you drive.
You might have seen people driving those cars or know anybody taking advantage of the free car program. It's an easy way to make some extra bucks. It probably helps to own another car to drive to parties, church, weddings, and such. Having a car for free but tied up with restrictions about driving to certain routes or a certain mileage per year is definitely not for everybody.
And making extra money, in exchange for some inconveniences, for some people, is worth it.
Also remember that the ad stays on your car 24 hours a day, seven days a week. You can't take it on and off. If this is your only car, you must be prepared to drive the car everywhere you go — to weddings and funerals, to work, to school, to the mall, and everywhere else that you drive.
Competition for these cars is very heavy, outstripping demand in many cases. It may take up to 90 days to get accepted into a program. Therefore, you have to be well qualified and patient in your attempt to land one of these deals. Free is not always easy.
But, for a car, it might all be worth it.