+@node 8sync's license and general comments on copyleft
+@chapter 8sync's license and general comments on copyleft
+
+8sync is released under the GNU LGPL (Lesser General Public License),
+ version 3 or later, as published by the Free Software Foundation.
+The short version of this is that if you distribute a modifications to
+ 8sync, whether alone or in some larger combination, must release the
+ corresponding source code.
+A program which uses this library, if distributed without source code,
+ must also allow relinking with a modified version of this library.
+In general, it is best to contribute them back to 8sync under the same terms;
+ we'd appreciate any enhancements or fixes to be contributed upstream to
+ 8sync itself.
+(This is an intentional oversimplification for brevity, please read the LGPL
+ for the precise terms.)
+
+This usage of the LGPL helps us ensure that 8sync and derivatives of
+8sync as a library will remain free.
+Though it is not a requirement, we request you use 8sync to build free
+ software rather than use it to contribute to the growing world of
+ proprietary software.
+
+The choice of the LGPL for 8sync was a strategic one, though in general,
+ we encourage stronger copyleft.
+(For more thinking on this position, see
+ @uref{https://www.gnu.org/licenses/why-not-lgpl.html,
+ Why you shouldn't use the Lesser GPL for your next library}.)
+
+In particular, if you are building a library or application that uses
+ 8sync in some useful way, consider releasing your program under the GNU
+ GPL or GNU AGPL!
+In a world where more and more software is locked down, where software is used
+ to restrict users, we could use every chance we can get to provide
+ protections so that software which is free remains free, and encourages even
+ more software freedom to be built upon it.
+
+So to answer the question, ``Can I build a proprietary program on top of
+ 8sync?'' our response is
+ ``Yes, but please don't.
+ Choose to release your software under a freedom-respecting license.
+ And help us turn the tide towards greater software freedom...
+ consider a strong copyleft license!''
+
+