[vortico]

Since you mentioned movements in free software, "open core" has been emerging in the last 4 years as a viable way to do business while allowing other individuals and companies to build onto your core platform while still being able to monetize your work. For example, if you launch a startup specializing in building foo, you can maintain a library called libfoo and sell a larger foo application or foo plugins or foo services using the open-source library you created.