Not complying with an open source license can be enforced as copyright infringement rather than a contractual dispute.
Neo4j used GPL by the way.
https://www.finnegan.com/en/insights/articles/open-source-so...
There is clear precedent for that: https://www.techdirt.com/articles/20170515/06040337368/us-co...
Then you bring in the question of civil vs criminal but the point was copyright versus contract.