So if a viewer watches 155 ads (impressions) in a month they have earned Netflix more money with their eyeballs than they saved in subscription cost.
Netflix says people should expect “about 4 minutes of ads per hour” which is notably not directly equivalent to impressions. If each ad is 30 seconds it takes about 39 hours to reach 155 ad impressions. That’s close to 80 minutes per day each month.
Another way of looking at it is that you get paid $6.58 per hour to watch ads, up until you’ve watched 77.5 minutes of ads. After that you are paid $0 to watch ads.
[0] https://digiday.com/media-buying/netflixs-cpm-still-under-bu...
[1] They also say it was reduced from $65 (131 impressions) and plus this is a sales game so the rates will be up and down all the time based on KPIs and competitions to win steak knives and more comprehensive media buy deals.