Summary: it's an EULA. 'Hello' is licensed, not sold. The cost for a license is $0. It's copyrighted by AMSDEC. You may redistribute the Hello binaries and such so long as you include the EULA.
My opinion: the authors have never heard of the GPL but they might like it if they were to learn about it somehow.
http://www.amsdec.com/license.html
Summary: it's an EULA. 'Hello' is licensed, not sold. The cost for a license is $0. It's copyrighted by AMSDEC. You may redistribute the Hello binaries and such so long as you include the EULA.
My opinion: the authors have never heard of the GPL but they might like it if they were to learn about it somehow.