I always see people with the argument that the developer labour is somehow being exploited. But have you never thought that maybe, just maybe, the person in question does not care? He just wanted to publish his creation and be done with it. He does not care if people are using it. That's my case. I don't care if people want to use my piece of cryptographic library. Just be aware that I am just some random dude, providing no support nor warranty. I make the library for my use cases and it works fine.