I am currently in talks with a philanthropic organisation about building such a platform. To me the challenge is not technical, it's commercial. How can you bui

I am currently in talks with a philanthropic organisation about building such a platform. To me the challenge is not technical, it's commercial. How can you build a sustainable business model without adds? I'd be interested in peoples thoughts about ethical ways to monetise such a platform. The goal would be sustainability, not growth.