I'm a bit annoyed about people running popular open source projects suddenly creating drama like this. The reason these projects got popular in the first place were often that the author didn't care for fame, glory or money; they just wanted to solve a problem.

And well, to be clear: most of us prefer to use an open source library, over a commercial library.

What I'm a bit upset over here is the bait and switch here.

Using the open source aspect of your library to get widely spread, but also somehow expecting to make money off this, somehow - this doesn't make sense.