That’s what PieFed changes though. You can still track how someone votes, but you can’t tie it to a specific profile (without doing some extra analysis and even then you can’t be completely sure).
Or, with my suggestion, you could track how that specific account votes, but it would be easy to obfuscate who exactly it is and (hopefully) impossible to track to the user’s other identities.
Also, this isn’t even compatible with copyright law in some countries. I.e here you can’t give up authorship at all; you can only grant an irrevocable, perpetual license (that might even prohibit you from distribution yourself and such) but you’ll always be able to say “I made this” no matter what their license says.