To exorcise parasites from the earth, ram a cross into the ground and magic godly waves will drive then out

Not sure reality agrees here. Unless the project is huge, it will most likely not see any money. With copy-left code they are at least required to share their improvements and contribute that way. (I am aware of the no-gpl policies of many companies)

What’s probably a better Model are Nextcloud’s “SupportaaS”, Sourcehut’s consultancy, or mailcow’s SaaS. (I also see SaaS critically, but if it’s Libre I’m okay with it)