[_ZeD_]

if you prefer "is free software dying"?

[schoen]

The MIT license is free and open source.

https://opensource.org/licenses/MIT

https://www.gnu.org/licenses/license-list.html#X11License

Maybe "copyleft" or "reciprocal" licensing?

[cyphar]

Without copyleft, we wouldn't have free software in the form it is today.