The car sharing service already exists in Finland. It's not very popular because it's expensive to rent a car for use, and renting one's own car to someone else

The car sharing service already exists in Finland. It's not very popular because it's expensive to rent a car for use, and renting one's own car to someone else is not very profitable (so most people won't do it). Besides, it means that the car owner can't use his own car any time he pleases (which is a key selling point of owning a car in the first place).