That does not answer the core question I have. The project itself seems to be a mod and not violate any copyright, as far as I know. So assuming that, how is it legal to take it down? Companies the hoster of the mod, not the modder itself (also applicable to videos on YouTube in example) will take anything down without hesitation and questions asked, if it is a DMCA request. That does not mean its legally correct at that time and must be investigated.
So my question is, how a end user agreement can be a reason to DMCA, if the modder itself does not agreed to the EULA in example. How is it, that a company can decide if and how a product from a hobbyist is monetized, if it is not their product?
In example, do you think YouTube should be able to shutdown all third party YouTube players, because they sell the software? That would be a similar situation with this DMCA takedown.