Free and Open Source Software

Malus, which is a piece of "satire" but also fully functional, performs a "clean room" clone of open source software, meaning users could then sell, redistribute, etc. the software without crediting the original developers. But I have a hard time with the "clean room" argument since the LLM doing the behind-the-scenes work has already ingested the entire corpus of open source software -- and somehow the output of the LLMs isn't considered a derivative work.