Wow! That's an amazing idea! I share the 17 Global Goals for Sustainable Development by the United Nations. And I understood the value of this idea. It's pleasure to work for making the world better.

Moreover, I use https://periodix.net/ to search for remote projects. Because it's some popular job boards in one place. Perhaps, you can cooperate with them to get more potential candidates.

I really like this idea - and would recommend it to many of my tech friends who have lost their sense of purpose or contribution to the greater good. one piece of feedback is that it makes the project feel less sincere to have your promotion for your 12 in 12 project within the page, so i'd consider removing that