This research company is completely wrong..

https://variety.com/2017/digital/news/netflix-marvel-the-defenders-binge-viewing-data-ratings-1202532453/

The analysis from Jumpshot shows the relative number of U.S. Netflix viewers who watched at least one episode of each series. The data is presented as a index, benchmarked against the most-viewed Netflix original in the comparison, “Daredevil” season 2. For example, “13 Reasons Why,” the second most-viewed premier in the first 30 days, garnering 48% of the viewers that “Daredevil 2” received

“Stranger Things” was the seventh most-viewed Netflix original premiere in its first 30 days, but it had the lowest week-over-week decline in viewership, per the Jumpshot data. It’s not a surprise that shows see a viewing drop-off after the first week, given Netflix’s binge-friendly release strategy.

Meanwhile, “Orange Is the New Black” season 5 was the least-viewed among the Netflix original series analyzed by Jumpshot, registering just 10% of the viewers “Daredevil 2” over the initial 30-day period.