"Blockchain technology" are they in breach of the GPL?

[stan.distortion]

...

[Soros Shorts]

The code is pretty rudimentary. It is not that difficult to rewrite (or even just refactor) so that the resultant code does not violate the GPL of the original. If they only used the software in-house without releasing it they could even copy the code. It is not like it is Affero GPL where they'd need to release the code even if they just used in a SaaS offering.

[Carlton Banks]

Don't care. Imitation is the most sincere form of flattery. Abandon this concept of intellectual "property" imo. You can't viably possess or police the possession of simple information in today's world. Either keep it to yourself, or release it. If you do release it, and it's useful, it's going to be everywhere whether you like it or not. That's just the reality of common modern day digital tools.

And the banks aren't going to be innovating along the lines that gave birth to the blockchain in any case. Banking fintech doesn't seem to encourage innovating the wider banking business model into the history books.