Comment Unfortunately, they didn't use CC-BY-SA (Score 3, Interesting) 35
The Open Gaming License is a superior license for anyone who wants to make use of the open gaming content that already exists, including all the materials Wizards has released using that license (which includes most of the 5th Edition) because it is a share-alike license. Wizards has chosen not to use the Share Alike version of the Creative Commons license and has thus created the very bad situation where people can take from the community of open game content published by anyone who chooses to use that fork then make the resulting work closed so that whatever they do with it does not convey the same rights & freedoms.