Comment by jacobr1
The trick is the find some way that a vendor can monetize it. Sometimes you have management consulting groups building crappy unmaintained (except by them, if you extend the contract) OSS.
One thing that seems to work, sometimes, is having cloud vendor support. Could you support maintenance of an OSS platform that AWS (and/or their competitors) operates - that way AWS could "win" the contract, but the OSS system gets funded with a core team and various groups still contribute to make it better