It's been licensed as GNU

Initial release January 1995; 22 years ago
License GNU General Public License v2 or later[4]
Operating system Windows, macOS, Linux
Size 71.7 – 144.1 MiB (varies by operating system)[3]
"On July 18, 2002, Roosendaal started the "Free Blender" campaign, a crowdfunding precursor.[7][8] The campaign aimed for open-sourcing Blender for a one-time payment of €100,000 (US$100,670 at the time) collected from the community."

https://en.wikipedia.org/wiki/Blender_(software)

so it's been 15 years of fre blender :) the Cycles render s great, the sculpting there is awesome, you have a mudbox inside :D a close to Vray(you can get the real vray too) for free it's a great applcation, but I can't deal with the hotkeys and I've left it to the side :) for me to use a program I need a few months to get the ropes together :D