(2013) MySQL CEO on 2 Open Source Business Models https://www.heavybit.com/library/video/mysql-ceo-on-2-open-source-business-models/
(2013) Open source is brutal: an interview with Google's Chris DiBona https://opensource.com/business/13/10/interview-chris-dibona
(2017) Choosing A Model For Your Open Source Business https://snipe.net/2017/08/05/choosing-a-model-for-your-open-source-business/ https://news.ycombinator.com/item?id=25728352