Never heard of that before, that is awesome. If I had to guess, why it is found in third world countries, not in first world countries, I would point to cost o

Never heard of that before, that is awesome. If I had to guess, why it is found in third world countries, not in first world countries, I would point to cost of labour and energy. It matters if the driver is paid 3$/hr or 20$/hr, and if the petrol is 2$ or 7$ per gallon.