Beware of license scam
Scammers are attacking GNU/Linux users with fake "GNU/Linux Activation Technologies".
This is usually done by using malicious software "glat-client" which uses annoying messages like "Your GNU/Linux copy is not activated. Purchase a license at example.com". Unfortunately, it is not detected by any antivirus software.
They also attacked mailing lists of GNU/Linux distributions using spoofed emails, but most of them are protected against this attack now.
There have been reports about GNU/Linux copies sold in some stores but I cannot confirm any of them.
Last time this software was seen on Codeberg: https://codeberg.org/Codeberg/Community/issues/125
Broken copy of this malware, server source and main scam article is available here (NotABug admin refused to remove this organization): https://notabug.org/GLAT
I don't think it's helpful to censor the source code from NotaBug. Scammers will most certainly have their own sources of copies. Having a copy on Notabug - marked as a scam tool - is a way for security researchers to study it and help admins and users protect their systems from it.