AV Club urges Netflix to release own ratings

https://www.avclub.com/netflix-says-nielsen-s-data-is-inaccurate-so-why-doesn-1819652138

Nielsen Ratings Academy

http://sites.nielsen.com/newscenter/nielsen-ratings-academy-educating-audiences-power-media-measurement/?cid=socSprinklr-Nielsen  

alpha60 White Paper: Piracy Ratings for Game of Thrones Season 7 Episode 1 (701)

***WHITE PAPER*** Abigail De Kosnik and Benjamin De Kosnik 23 July 2017 alpha60 Data and Analysis of BitTorrent Peers and … More

Vulture: The 2016-17 TV Season in 5 Really Depressing Charts

http://www.vulture.com/2017/05/2016-2017-tv-season-in-five-really-depressing-charts.html?mid=twitter_vulture

Nielsen Streaming Report

The Walking Dead seasons have their own Wikipedia pages with Live and DVR (+7?) ratings for each episode

The Walking Dead season 7 Wikipedia page with ratings here.

Best site for TV ratings that I have found

STVPlus+ <– this goes to the page for The Walking Dead

AMC Press Release: “THE WALKING DEAD” SEASON 7 MID-SEASON PREMIERE DELIVERS 15.9 MILLION TOTAL VIEWERS” (s07 e09)

AMC Press Release dated February 17, 2017 here.

The Walking Dead s07 e09 (mid-season premiere) Nielsen ratings Live+3 = 15.9M total viewers

Story from AMC press release on The Futon Critic here.