Most of the benefit of open source projects is that they are open to collaboration, I would avoid even using a project with policies like that if I knew about them.
That seems to be in line with what the author wants. Plenty of people prefer open source to mean "you can copy my code," and not "let's build something together". You using, or not using, the author's code will likely have no impact on him.
I have a variety of open source projects, and some fall towards each end of the spectrum.
understandable, athough I can also understand his position.
Actually I think he himself just wants to not collaborate, but I don't see anything saying that you can't copy his code and then collaborate with others.
There are also other benefits of open source other than collaboration, such as security from being able to review the code, and being able to run in a totally free system.
I have a variety of open source projects, and some fall towards each end of the spectrum.