Personal cars are being used as taxis.

Here in my town people use their private cars to transport people for money.

Some of the people who own cars view this as an added advantage to put their cars to more use and earn more.

They have intervened the work of these bigger taxis that are big to carry 14 passengers.

Their advantages include getting full fast, as they carry less people and so people want cars that shall not delay on the way, as it is easier to fill space for 5 people of a small car.
That is how some people use their cars.