It prevents commercial distribution of the program, and thus it discriminates against persons and groups who wish to distribute the program commercially.
Uhhhh what? That’s not how any of that works.
“No discrimination against persons or groups” is about protected classes.
Interpreting it to mean “anyone for any reason” would mean that open source allows people to simply assert sole ownership of it, because to not allow them to is to discriminate against people who want to assert sole ownership. That’s an ad absurdum broadening of the OSI ethos.
…and the blog author was in fact incorrect in their assertion that it violates the personal discrimination clause (clause 5). It is a violation of Clause 6, “No Discrimination Against Field of Endeavor.” Also, the section specifically talks about prohibiting its use by a business, which is not the same as its sale by a business.
Let’s say Alice develops an application with maintainer lock-in, but for whatever reason the need for a fork arises. Bob has been studying the code and knows how to maintain in properly. However, because Alice’s code has a non-commercial redistribution clause Bob cannot make money off his maintainership. If the software is sufficiently complex that Bob has to spend a lot of time on it, or if Bob must be able to provide paid support (e.g. for regulatory reasons) he is not allowed to do so. Only Alice can demand financial compensation and thus in practice she is the only one who can afford to maintain the code.
Oh no. This person literally IS trying to just be able to start charging money for someone else’s code.