Berliner Sam Muirhead tries to live completely open source for one year:
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Open source as a development model promotes a universal access via a free license to a product's design or blueprint, and universal redistribution of that design or blueprint.
Open source gives 4 freedoms:
- the freedom to use the software for any purpose
- the freedom to modify the software
- the freedom to share the software
- the freedom to share the changes you make
Give something for free and you will get much more than if you would sell it.