I think congress amended to the constitution to require that no president serve more than 2 terms as to be sure no president turned into a king or tyrannical leader. I agree with this amendment as it helps keep order and wont allow any president to overstay their welcome and gain to much power. The founding fathers were just escaping a king and they would not want a president to be like a king.
This is because that particular country has special rights regarding resources produced/available in the particular land hence they can decide to charge fees for economic activites.