The blog post says, "Public topic pages will be free to access and the text available on CC 4.0."

What does "CC 4.0" mean? There are many version 4 Creative Commons licenses. I looked at an actual Golden article and the bottom of the page says, "Text is available under the Creative Commons Attribution-ShareAlike 4.0; additional terms apply. By using this site, you agree to our Terms & Conditions."

Okay, so CC-BY-SA-4.0... similar to Wikipedia.