Hasn’t Creative Commons disavowed or at least really downplayed the NC license for exactly these reasons? There are so many ambiguities and headaches involved that the only advice I’ve ever seen is not to use it.

Rule of thumb:

- If it’s a company doing an NC license, probably best to be careful because they can make your life hell with lawyers.

- If it’s a random joe doing an NC license, feel free to ignore it because they don’t have the money to defend it anyway. Especially so if it’s CC-BY-NC-ND, people that pick that one are especially likely to be in the all-bark-no-bite category.

At least that’s how one of the companies I worked for treated CC licenses… I don’t work there anymore.

I'd love to see more info on this

Likewise, I was unaware of this (and still see it in use regularly, especially on places like Printables as I've recently gotten my hands on a printer myself)