1. With your "so what?", you confirmed that people copy-pasted the code.
2. You can use the code, but you cannot use that to profitable uses. You can fork the code, change a lot of things, and use that for commercial things. Also, you can use the code for non-commercial.
3. Look the Trezor and NVK source code and see how much of that is equal.

KoreaComK

Also, so what if they did? Is that not the spirit of FOSS? And NVK copy-pasted from Trezor, should not the same principle apply? 

SirGalahodl

https://www.youtube.com/watch?v=QzVto_cwC6c
The NVK talking about this topic.

Source? 
https://www.zherbert.com/an-open-letter-to-nvk-and-coldcard/