Digital humanities opened an endless avenue offering possibilities for online research and teaching. As long as you have the democratization of the accessibility to technology, Digital humanities can disseminate knowledge and scholarship from academia towards the rest of the world. The work of public and digital historians needs to approach this expansion in order to achieve some future/present success.
There are pros and cons in all kinds of licenses, you have to adjust your goals to each one of them. Beware that, for example, at the same time the free usage of content develops an avenue to the great international in-depth debates and it helps you think about your research, it also fuels the misuse of produced content in a way that content producers are constantly not cited. However, as a researcher who intends to publicize academic findings as much as possible, I believe that having tools of publicly sharing information contributes enormously to qualitative changes in the way historical research is done around the world.