This is a good question, I'm not actually sure to be honest with you.
So far I've heard nothing about the main project receiving any sort of threats, and even the Steam page wasn't officially DMCAd or the like. It was more of a threat saying they WOULD officially DMCA if the project wasn't taken down.
It's very interesting that it was played like this rather than just officially issuing a DMCA takedown request. Almost like they weren't 100% convinced the official DMCA would actually hold up?
I would like games to arrive as a single complete package, but I was relatively fond of expansion packs from games like RollerCoaster Tycoon.
They took the game you already had, and pretty much doubled it, they were fantastic!
Far better than any modern DLC for sure.