The key is "if you felt like it". He didn't, not because he felt his time is worthless but because he wrote it for himself and if it helps anyone else, well tha

The key is "if you felt like it". He didn't, not because he felt his time is worthless but because he wrote it for himself and if it helps anyone else, well that's just making him happy for having helped someone. It's not arguing that it didn't cost anything. It's arguing that it's his choice whether he wants to cover his costs or give it away for free. If someone was forced to license their software under the GPL, then the author would have a point. But he doesn't.