"I say we just go with NSIS cause it's freeware..."
you have said "freeware" again when you are actually mentioning "free software"
and if you hate the GNU project and the FSF like PMB you can say "open source software", but in either way software like that is
not "freeware". Free software doesn't have to be in zero price (just like thost GNU/Linux distros), and they don't forbid commercial exploitation like freeware
(If you don't understand... the "free" in "free software" means "libre" in french.)