The way I understand the license is that if someone wants to sell a product which includes Mozzi or a modified version of Mozzi in its distribution, they would ask permission and possibly we would negotiate an agreement.
On the other hand, you could sell something which works with Mozzi but doesn't include it in the distribution, so that people can access Mozzi or a modified version for free and use it themselves with your product.
This might give clearer answers...
https://wiki.creativecommons.org/Frequently_Asked_QuestionsOne of the reasons I've licensed it this way (Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License) is to protect against my work being sold unacknowledged as well as unpaid, as if it was the work of the people marketing it, which happened under GPL3.