[Rapzid]

Maybe a coop of sorts could be formed where they pull in funds from sponsorships. A non-profit maybe. Devs could "lease" themselves to corporate sponsors and work on the project + some percentage time towards features they need. Sponsored development..

IDK could be a way to do it, pay the bills and some, and also limit the negative impacts public business or VC funded growth startup.

[HackerThemAll]

That doesn't work. For example Apple, benefiting from FreeBSD Foundation's work, never gave back any single penny to them, never sponsored any project within the Foundation. 1 million a year would mean a world to the Foundation, and would be less than a rounding error in Apple balance sheet.