It's a software company, it sells software. You can literally go read the docs. It doesn't magically bypass the law anymore than Microsoft Sharepoint does.
Do you expect palantir's public documentation to explain how they operate as a spy agency?
Your link and description of it as a software company are irrelevant to the discussion, which concerns their retention and use of personal data. I welcome anyone to give their disclosure a critical reading. (They promise to follow the law- whew!)