@Pacrat173 the license is actually a Creative Commons license for Non-Commercial uses. Creative Commons is a copyleft license that's "free to use with some restrictions". Mostly used in art, literature, audio, and film, for my part I'm using it to license my comments. Anybody can cite with attribution, but commercial use is forbidden by the license.
The why: I just don't like non-opensource commercial ventures. Google, Microsoft, Oracle, Facebook, Apple, and so on are harmful in many ways.
Enforcement and legality: Microsoft's Github CoPilot (a large language model / "AI") was trained on copyrighted text source code. A few licenses clearly state that derivatives should also be opensource, which CoPilot is not. So there is a big lawsuit against it. Many artists, non-programmer authors, musicians, and others are also unhappy that AI was trained on their copyrighted works and have sued for damages.
Until these cases make it out of court, it will not be clear if adding a license to comments could even jeopardize commercial AI vendors.