Making money with it is harder when you open source it. Or let's say you have to create a business model around it. Before i dive too deep into it, take a look

Making money with it is harder when you open source it. Or let's say you have to create a business model around it. Before i dive too deep into it, take a look at Gitlab or Open XChange ;) - They are both open source and they have created business models that make it possible to earn money with value adding services.