This might get you started…
“NL: The GPL grants a perpetual license and cannot be taken back. Some would correctly argue that MaidSafe could fork the code and change the license of that fork to a proprietary one, which of course we would never do. How can you expect to decentralize the Internet using proprietary software? But this would not change the license of the original code—code that we are actively helping and encouraging others to maintain and develop without us…”