"Market" implies money, income, trade.
How do you make money from free software? Short answer --- you don't.
There may be a need/desire but there is no real "market" for Open Source.
How do you make money from free software? Short answer --- you don't.
There may be a need/desire but there is no real "market" for Open Source.
Are you sure?
I haven't done a survey but my guess is that the Open Source developers being supported solely by their projects are a very small fraction. But best of luck becoming one of the select few.