The Mechanics of Open Source

Here is how free software works:
https://pixabay.com/en/forum/official-pixabay-news-2/the-pixabay-license-7823/

people shared various images under creative commons license, and one day site owners suddenly claimed ownership over user images, promising to sue anyone using them under free license.

>>21
it is a bit more complex than that. placing everything in public domain does not nullify the so-called 'moral rights' (e.g. Nothings releases his libraries in public domain so you can use them, but you cannot legally claim that you created them). also, I don't think that 'nullify' is even a good term. this is important because it implies a few different things: you can't take a public domain work, release it under your're are license and then sue other people for releasing the same work.