You have a good point. It's a spectrum. There are software companies that thrive by using different models. Some are based on open source, some are based on clo

You have a good point. It's a spectrum. There are software companies that thrive by using different models. Some are based on open source, some are based on closed source and some even mix the two. Some other companies as listed elsewhere are ad-companies and give away software to bolster their eco-systems.