Earlier quoted context omitted.
"What we're doing isn't technically illegal so stop talking about it" isn't generally a phrase used by what I'd call good people, but we'll agree to disagree.
I don't get the objection here. Forking is part of how open source is supposed to work.
(I'm not saying this is what happened; I know nothing about this project. I am saying this seems like the assumption the author of the article and some people in this thread are making. I bet that's not what happened, but if YC is actually full of dumb idiots who do zero due diligence whatsoever, then I guess I have to agree with the article's thesis.)