According to the page, from green to red does not subtract any point but running twice the tests with errors subtract 5 points? Kind of arbitrary rules that have nothing to do with TDD if you ask me.
If we assume that this would legitimately motivate a developer to change their behavior, it seems like it would just incentivize them to run tests less frequently.
I think that's a misrepresentation. HN has enjoyed a long run as a forum with a professional vibe. Its owner, and the core constituency, do not intend to let it become the next Slashdot/Fark/Digg/Reddit. You can find more background here:
Actually folks like it when second parties tell third parties not to do stuff that the aforementioned folks weren't planning on doing and find annoying when they are done by said third parties.
While I disagree with the tone of this comment, I have to admit my first thought was "TDD has jumped the shark". The last thing I want is some random critter getting happier or angrier based on the results of my testing. I don't want "Agile Clippy", thanks.