The shocker now is the slow march from truly free GPL-licensed (or similar) works “backwards” toward a proprietary license. This phenomenon was documented last month in a report entitled 2007 Open Source Think Tank: The Future of Commercial Open Source. It’s a good read for the OSS security vendors out there, just remember that it starts out with some biases and some sponsors. =) In fact, HD Moore has an excellent presentation on the economics of open-source security projects.”]
Source: https://www.csoonline.com/article/2136763/some-thoughts-on-licensing-and-security-applications.html