Strangely, there was no negatively in the comment you replied to, they were simply asking if is is open-source or not, as it didn't align with their expectation

Strangely, there was no negatively in the comment you replied to, they were simply asking if is is open-source or not, as it didn't align with their expectations of github-hosted projects (I would argue this would be the case for most people). Contrary to what you state, it is _not_ clear from the README that this is a commercial venture, just that the author provides an email address for any queries in relation to licensing, and actually includes _no_ copyright or restrictions on running the code in the provided documentation. One might even assume that since we've been provided a copy of the binary without any notices, we might be free to run said code without restrictions... but really, who knows? Hence the OP's questions.