Interestingly enough, CB wasn't DMCAed by Mojang, but actually from one of its contributors, who was angry that he had been contributing free labor to a project that was secretly owned by Mojang (there was no CLA so he was legally able to take down the project by not authorizing his contributions to be used). There was a whole lot of drama and conflicting viewpoints around about this, but here's a post about it that I think stays pretty close to just the facts. https://blog.jwf.io/2020/04/open-source-minecraft-bukkit-gpl... (not associated with the author)