I have tweeted about SO several minutes ago before I discovered this topic on HN: https://twitter.com/otarch/status/798647799411675136

StackOverflow is so powerful resource on the Internet, alongside with Wikipedia and Internet Archive.

I wish I could donate two ways: 1) Yearly or monthly (subscription) donations, like on Wikipedia 2) I would be extremely happy to donate authors of some great, life-saving answers. I feel so excited when I find the right answer after searching a solution for hours.

Just shut up and take my money!