Nigeria, Sept. 15 -- When a donor offered money to an organization working in Kenya, it came with an opportunity to expand its work into more communities. For a small organization that needed funding, it might have seemed like an easy decision. It wasn't.

The donor wanted the organization to expand quickly. The organisation said the communities it was already working with needed deeper support before it moved elsewhere. So they made a tough decision.

"They respectfully denied the funding," said Nafissatou Sene, senior manager of Portfolio Services at African Collaborative, an organization that raises money and funds for African groups working in health, education, gender justice, agriculture and livelihoods.

Sene declined to identify t...