alt Hacker NewsThere is no moral obligation, either - that’s my point. They chose to give it away for free. It’s the author’s explicit decision that there is no obligation placed on recipients.
Giving a fake gift that comes with unspoken strings attached (and “keeping score” in your head) is the passive-aggressive, immoral act. If reciprocity is expected, it is definitionally not a gift.
Releasing software under a free software license is a choice to give a gift to the world. If the author wanted moral obligation strings attached, the license would say that.
The license only says what you MUST and MUST NOT do. The comment you’re replying to talked about what they SHOULD do. These are different concepts and they are codified differently by humans: the former in licenses, the latter socially. You’re experiencing that process right now.