Every single TV manufacturer does that. In US, Vizio the largest HDTV brand openly sells this as a service to media agencies. Samsung and Japanese TV manufactur

Every single TV manufacturer does that. In US, Vizio the largest HDTV brand openly sells this as a service to media agencies. Samsung and Japanese TV manufacturer data is much harder to access to and Japanese brands are generally scrupulous over permissions. No one matches any personally identifying info with this viewership data... It's all anonymized. Source: work in ad-tech and have personally worked with this kind of data from different firms.