Effectiveness: Being good at games is being effective at using the means at your disposal
Many games are about using your limited resources wisely, be it money, mana, time, or even the player's limited concentration. Having plenty of resources is not enough, you also need to use them well. You have mastered a game when you have learned to use your resources to the greatest effect.
It is only natural that gamers apply the same rational approach to fixing the real world. We want you to be able to choose between four different categories of charities. Think of picking one as deciding how to spend your resources in a real-time strategy game. Do you want to produce units directly (donating money to poverty alleviation or animal welfare & climate change) or advance the tech-tree (meta-charities or far-future & research)? Where will they have the greatest possible positive impact?