We are grateful to the growing number of people who have offered donations of various sizes. Subscriptions help bring in some revenue, but much of what we do is bootstrap-funded by Chris and Adam. Your donation will help ensure that our message remains free and available to everyone. Even if you feel that a subscription is out of your budget, please consider a donation, no matter how small. The donations we receive are used to fund translation of the Crash Course into more languages, so that it can be shared with an increasing percentage of people around the world. Note: All credit card transactions are in US Dollars.