One thing that is not stressed in the article but seems relevant, is that, while being designed to detect and block fraud attempts without de-anonymizing users,

One thing that is not stressed in the article but seems relevant, is that, while being designed to detect and block fraud attempts without de-anonymizing users, the system might very well be super effective against malicious SEO as well. Wondering how techniques to game search engines will evolve in the future with counter-measures such as this one.