Huge leak of Google's Search algorithm internal documentation

Looks like "more than 2,500 pages of API documentation containing 14,014 attributes (API features) that appear to come from Googles internal Content API Warehouse" have been leaked, exposing what people in the SEO industry reckon "directly contradict public statements made by Googlers over the years, in particular the company's repeated denial that click-centric user signals are employed, denial that subdomains are considered separately in rankings, denials of a sandbox for newer websites, denials that a domain's age is collected or considered, and more". The source of the leak is "Erfan Azimi, an SEO practitioner and the founder of EA Eagle Digital", who handed it over to Rand Fishkin, the founder of SparkToro, an "audience research" tool and Mike King at iPullRank, an SEO consultancy. If you're in the SEO game you gotta read this. For the rest of us, SEO is still a black box of bullshit.