I thought about FPC and Lazarus. Not all open source projects can use the same way to sustain themselves, but all open source projects that want to be sustained need a way to do it.
Take Your FOSS Project From Surviving To Thriving
https://archive.fosdem.org/2024/schedule/event/fosdem-2024-2741-take-your-foss-project-from-surviving-to-thriving/
(recommend speed: using firefox | video player right click menu | speed)
