What is the latest, state of the art way to earn money this way ?
Completely not proven yet, but I'm convinced: ask for it. Make it easy for people to pay you. Find a way (and reason) for people to invoice you for payment. Tell people that you expect payment even if they don't legally have to pay. Make it part of the "community ethos" that payment is a natural and good part of working with the community. Free as in freedom, not beer. Ask for beer and give freedom in return. I have…
This is the case for consumer software. I am not even trying to imagine how harsh it would be for an open source maintainer - who has absolutely no leverage given the source is already out there. What’s happening with docker, elasticsearch, Redis, MongoDB et al is not giving me hope either.