The site most similar to us is probably Open Data.
At Open Data, while license-related questions are numerous, there are even more questions about particular open datasets. Those questions:
- Are not about the concept of open data itself
- Are about a particular dataset that happens to be open
- Are often very interesting
- Often have great answers
Some are about the history of a particular dataset, for instance a dataset that used to be available at URL1 bit can not be found anymore (example). Often someone has kept a copy of the dataset somewhere, or it has been merged into a larger dataset, or it is now maintained by a different organization under a different name. As you know, the exact same events happen frequently with open source code.
I can't find the URL anymore, but there was a blog post or beta advice piece that told betas how questions should not be about the concept itself, and instead should be questions that arise in the context of this concept, for instance questions on the aviation site are not about the aviation concept itself, but down-to-earth (so to say) questions about particular planes. If anyone know the URL for that please edit or comment, thanks!