TL:DR
TLDR - new investment models / Bill and Melinda Gates Foundation originally was designed as a vehicle for pure charity and changed their investment model such as offering loan guarantees versus one time donations. https://hbr.org/2012/01/a-new-approach-to-funding-social-ent...
There is a need for social ventures to seek these types of investments to fuel their revenue / impact growth such as through social impact bonds and more.
Having an "alternative market" or marketplace in this sector for SMB's would go a long way to improving the world in my opinion. What are your thoughts? Does anyone know of such a marketplace?