A software using CC-BY-NC-4 is not a good option, as it was made for media. If skiff markets itself as open source, it should respect the guidelines of opensource( it’s open source(https://opensource.org/osd/), you can read the 6th rule. It says the software should not be limited for commercial use.)
Skiff licensed all of it’s apps it at CC-BY-NC-4, why not change it for GPL 3.0 to make it a real free and open source software that respects user’s freedom and mandates the fork to be free and open source. There’s a difference between free software, open source and source available!
A software using CC-BY-NC-4 is not a good option, as it was made for media. If skiff markets itself as open source, it should respect the guidelines of opensource( it’s open source(https://opensource.org/osd/), you can read the 6th rule. It says the software should not be limited for commercial use.)