Using opensource technology is better for the environment. Yay for free stuff and protecting that thing I love!
Free software is often usable on older hardware, more secure, more easily customized, less expensive, and available in more languages. These are substantial benefits, but they are all a natural result of the most important considerations—freedom and independence. The celebrated power of the Internet as a tool for political action depends on the ability of ordinary people to have uncensored control over the tools they use to participate in society. If the tools used by activists are proprietary, they will be inherently limited in what they can challenge and change by those who make and exclusively own the tools.