“I came across this at a very sad point in my life, it was on a hard drive on a vintage computer I bought off Amazon,” Marshall explains on the expansion’s GitHub page. “Literally this essentially saved my life, I was going through a divorce and just happen[ing] to come across something like this was insane.”
Nah that’s not how that works. He might have obtained it legally and accidentally. But he made the decision to then distribute it. He can most definitely get sued for that. If you want to distribute basically anything, you need the right permissions / license for that.