I responded here

https://twitter.com/Raemon777/status/876489114861830144

Givewell's made it their mission to find the best nonprofits working in exactly the near-term, urgent but high-impact space.

How can we further coordinate our action on this? Reward people who tweet?

If I ran an EA charity, I would definitely spend the hour to create a Twitter account and reply, earning a nontrivial chance to introduce my organization to one of the richest people in the world.

A year later, Bezos has launched a $2 billion dollar fund to help the homeless.

https://www.bloomberg.com/news/articles/2018-09-13/amazon-s-bezos-launches-2-billion-fund-to-help-the-homeless

This looks awesome!

My contribution: https://twitter.com/pwgen/status/875938651305164800