According to that site, Free Software (as defined by the FSF) is not Copyfree. As far as I can tell, Copyfree is like the BSD license, except you can only rest

According to that site, Free Software (as defined by the FSF) is not Copyfree. As far as I can tell, Copyfree is like the BSD license, except you can only restrict changes to the license text itself; the license itself may not be changed or added to, but everything else in the project may be used and changed in any way. So, effectively, it seems like a license where the license itself is copyrighted with all rights reserved, but the rest of the project is public domain. So, just like BSD, anyone can take a Copyfree project proprietary, turning it non-free. The GPL is as important today as ever.