"Gosh, how can free software projects get funded?" A complicated question, but in this @librelounge episode we take a crack at answering it! https://librelounge.org/episodes/episode-8-funding-free-software-development-pt1.html
Part one of two!
For example libreoffice. A largish organization could have some people who can do local advanced support and customization also as a result contribute to the development of the project.