Philosophical Alignment

No Vendor Lock-in

Many NPO's see FOSS (and GNU/Linux) as a way to gain relative independence from a single large proprietary software.[2]

Volunteers

Non-profit organizations with experience coordinating volunteers may be particularly well suited to working with and coordinating FOSS projects.

Freedom

For a large number of free software developers and volunteers, free software is about making the world a better place.

There's room for synthesis from the word, “go.



[2] This is often a bigger deal outside of the US.