It is not "somehow ok". You either overlooked the last paragraph or decided to ignore it: > "As the request for citation is not a legal requirement this is acc

It is not "somehow ok". You either overlooked the last paragraph or decided to ignore it: > "As the request for citation is not a legal requirement this is acceptable under GPLv3 and cleared with Richard M. Stallman himself. Thus it does not fall under this: https://www.gnu.org/licenses/gpl-faq.en.html#RequireCitation https://www.gnu.org/licenses/gpl-faq.en.html#RequireCitation" It is not the "chat with Richard Stallman" that made it OK. It is simply not a requirement, but a request for citation.