Fun stuff: x11-misc/albert used to be licensed #GPL. Then the maintainer decided to arbitrarily make it proprietary with a custom license ("freeware, i.e. proprietary and source available", with a limited right to redistribute binaries for specific Linux distributions). Except that the project has received some pretty large contributions before that, and the authors of these contributions hold the copyright to them. Since the contributions were made under the GPL, they cannot be incorporated into a proprietary project.
On top of everything, the maintainer has *deleted* the issue discussing the license issues, in particular the GPL violation.
https://github.com/albertlauncher/albert/blob/f9a33001e9e2930291e8d1a8669a6c43d1de2269/LICENSE.md
https://web.archive.org/web/20210225183856/https://github.com/albertlauncher/albert/issues/765
https://bugs.gentoo.org/766129
Please specify license Β· Issue #765 Β· albertlauncher/albert
The Albert website says Albert is "GPL-licensed, 100% free and open source", but, as far as I can see, there is no license file or license headers or any mention of license or GPL in the ...GitHub