Looking at the GitHub, Issue #134 calls the idea "absolutely unethical and against the open web." Issue #113 say they "can't believe this is even proposed." Issue #127 adds: "Have you ever stopped to consider that you're the bad guys?"
Amazing work, thank you.
One piece of feedback: I would really love it if the top navigation would be visible after a bit of scrolling up, not after scrolling all the way up to the top (if that makes sense?).
RiF did that, after scrolling about half a page up, the top navigation came to view already, making it easier to navigate between top, best, saved, etc, and to access your settings and profile.