I have seen that the Creative Common license for Openbuilds parts has changed recently from CC BY-SA to CC BY-NC-SA and I am a little surprised for two points: CC BY-NC-SA is not really an open source license as it breaks the first rule of OS regarding free distribution. You can read this rule here: The Open Source Definition | Open Source Initiative According to Creative Commons — Attribution 4.0 International — CC BY 4.0 under "Considerations for licensors" they explain that the license cannot be revoked. If you add "NC" to the BY-SA license that means the old one is not usable anymore and so revoked. I am big fan of what Openbuilds has invented and I want to be sure I am using your licensing correctly. Thank you in advance for putting some light on this change.