We select them based on an objective fair criteria. Circular Economies globally are popping out like mushrooms and unfortunately it's hard to assess which ones are legitimate, so we have a high bar. You could say Geyser is one of the 'Curators', and as a platform our role is to ensure that projects that we vet are legitimate. See announcement:

Geyser

🌍❌ Global crowdfunding has a trust problem. 

Contributors ask: “Can I trust this project?” 

And when it’s hard to know...

See Field Partner Guide https://storage.googleapis.com/geyser-media/impact-funds/Field%20Partners%20-%20Presentation.pdf