Re: Anyone use a COLDCARD hardware wallet?

* Takes open source to the next level: The open source code can be viewed, verified and compiled directly from the device itself.

This is not correct. Coldcard is not open source, but rather, it is "source verifiable".

You can see their license here: https://github.com/Coldcard/firmware/blob/master/COPYING-CC

License: MIT

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CC 1.0 forbid to sell the software which makes it NOT open source.

Very reasonable that they forbid to sell purely their code, but they allow to use it in any other commercial product and sell those products based on their software. Again, according to the definition of MIT-licence the software which is liable to it is open source. I have never encountered the contradictions to this coming from reputable sources.