Ah yes, but I am not complaining about that, and I can understand that the author doesn't want to work anymore on the project.

What I am complaining about is the assumption that people using open source software have to contribute to the authors, expecially if they have plenty of money. Open source is not about that. If that is the expectation, a different type of license is probably better suited.

To put it in perspective, "we" on HN are like hairdressers who all chose to charge for our services.

So it's less of a complaint and more of well meaning advise that he too should work for pay.