Broadly speaking, the hacker ethos has relied on a "share and enjoy" metric, a direct reference to a bit from Hitchhiker's Guide to the Galaxy. People sometimes forget that the bit goes on to offer specific suggestions for those who are receiving something for free and have complaints regarding the flavor directed at the provider.
There's licensing around selling food. I wouldn't be against "license to practice software development," but I'd note that (a) that's a very different world than the one we live in and (b) I don't know that most of the open source software we enjoy, hack on, and bemoan would exist in a universe where licensing standards made every software engineer who had authored it beholden to a minimum standard of quality before distributing it.
Would apache have survived in a world where software engineers, or their software, had to be quality-certified? Would MySQL? Would Linux?
> Would apache have survived in a world where software engineers, or their software, had to be quality-certified? Would MySQL? Would Linux?
Yes