The beauty of bookmooch is that the points system exists to facilitate international mooches. In other words, the reason it is not simply one book given equals one credit is that by awarding extra points for people willing to send abroad, an international community of book swappers is able to exist. Without this incentive based on the points system, people from the US (mostly) and to a lesser extent from other countries simply would refuse to send books to other nations. Swaptree is a typically US-centric site. Even sites which do offer international swaps do not work as such because people are not willing to send abroad. Ask anyone from a country other than the US/Britain/Germany etc. and they’ll say the same thing about bookmooch - it’s a godsend. Extra points=reward for higher postage. Brilliantly simple really.