Razor and Blades Model(en.wikipedia.org)

https://en.wikipedia.org/wiki/Razor_and_blades_model

2 comments

You forgot to mention Nespresso and Tassimo!

Additionally, not all purveyors of razors and blades follow the razor and blades model: https://www.youtube.com/watch?v=ZUG9qYTJMsI