In this case they're not even trying to stop piracy cause as with their book "Refactoring UI" none of this stuff is locked behind DRM. You can possibly copy all

In this case they're not even trying to stop piracy cause as with their book "Refactoring UI" none of this stuff is locked behind DRM. You can possibly copy all the HTML and spread it around if you have access but that would be scummy and it's great that the devs here trust the users to not help such an effort and have not added intrusive methods to protect this. The license is also very permissive. For what we potentially get as this is closer to full release, it's well worth the cost