"The streamers [Hulu, Amazon, Netflix] don't share their ratings, but a new measurement looked at streams, viewers, engagement and more to determine which series have the biggest audiences," per Hollywood Reporter:

"Of the premium content offered by the Big Three streamers, the most popular shows in September from each were The Handmaid's Tale (Hulu), The Man in the High Castle (Amazon) and Narcos (Netflix), according to Parrot Analytics."

"YouTube is still the king of streamers."

"Cord-nevers": "There were 16.7 million cord-cutters by 2016, according to eMarketer, and there will be 40.1 million by 2021. There were 32.5 million cord-nevers (Americans who have never subscribed to pay television) in 2016, and that will rise to 41 million by 2021."

See the top 5 shows for Hulu, Amazon, Netflix.