There is no such thing as a free lunch On being an open source citizen Have you ever wondered? - Why do people write software for nothing? - How do those volunteers earn a living? - How do those companies pay wages? - How much did it cost to put this event on? - Is there really such as thing as a free beer let alone free software? - Is there any obligation on me as a user of open source software to contribute? - How can I contribute to open source if I am not a developer? This talk will explore the open source business model and the motivations of individuals, organisations and businesses that contribute to open source projects. It will hopefully prompt a discussion on what might be reasonably expected of users of open source software.