That list had me like
when I first saw it too. With Fuller House being so dominant and Narcos being so low, but when you look at what's actually being measured....
In its premiere date, September 30, and the five days after, "Luke Cage" has been watched by an estimated 3.52 million adults under the age of 50, according to SymphonyAM, whose app listens to sounds from users' televisions and takes that data to extrapolate viewership.
Those numbers place the newest Marvel show in fifth place after Netflix's original series "Fuller House," the fourth season of "Orange Is the New Black," season two of "Marvel's Daredevil," and "Stranger Things," based on their respective premiere dates and following five-day viewership.
So, first, this isn't real ratings, just that apps tally of viewership and it only tallies viewership in the five days following the premier. So the shows with strong pre-release hype are going to dominate this. Shows like Narcos and Making a Murder gained popularity through word of mouth, so I'm not surprised to see them so low. Many people didn't watch within the first 5 days.
Meanwhile, Fuller House had a lot of hype, i know I watched the first episode when it first dropped. But that was it. I bet that viewership fell off a cliff. I highly doubt Netflix (which has the real numbers) would consider that their most successful show.