Netflix prior to the roll out of their Open Connect CDN offering used Akamai, Limelight, and Level 3 as their CDN providers. When they rolled out Open Connect they offered ISPs the ability to peer directly with them at number of different peering exchanges.[4] This was a few years after the Level 3 Comcast spat. You seem to be confusing events.
[1] https://qz.com/256586/the-inside-story-of-how-netflix-came-t...
[2] https://archive.is/2AC6C#selection-735.154-735.169
[3] https://arstechnica.com/tech-policy/2014/06/fcc-gets-comcast...
If Netflix understood peering from the beginning, they wouldn't have ran into these issues and might have saved themselves some money.
Peering is what saved the Internet back in the late 90's through early 2000's and proved Metcalfe wrong. People using the Netflix problem to push for NN were wrong.