Enforcing the Pyramid of Open Source

Most blog post miss a critical point in OSS software: OSS authors can't charge royalty for the use of their software, but they can charge money for maintenance of said software.

And yet most OSS doesn't do that. Almost all widely used OSS has some other revenue model (if any). Volunteer maintainers keep complaining about burnout, and yet they don't directly ask for money for writing the software.

OSS authors don't owe anything to users if the users are not paying back. This is exactly why all OSS licenses contain the pharese ABOSLUTELY NO WARRANTY.