If you want people who use the software you develop to pay you to use it, you should not release your software under an open source license.

You probably already knew this, I don't mean to point out the obvious. I am just confused by your comment, and others like it that frequently come up on HN these days. People saying or implying that there is something unfair about using open source software under the license terms that its developers have chosen to release it.

It's more acknowledgement than is required to use most OSS.

If the OSS developers want to generate revenue, there are plenty of paths they can follow.