I know it didn't work for one mastadonian, but i think this is a good place to donate to medical causes:
https://watsi.org/profile/ffeb22b1a86f-ho
Let me know if I'm wrong!
I did try kiva before because @jjg mentioned them, but I later learned that their partners on the ground actually charge usurious interest. if you can live with that, here's another https://www.kiva.org/lend/1522469?name=gemlog7937&utm_campaign=permurl-share-invite-normal&utm_medium=referral&utm_source=direct
these sorts of things are about the only reason I can think of to want to make more money. do something useful with it.