I could see a way in which the anti-circumvention provisions that prohibit any distribution of tools which enable the circumvention of access controls could be

I could see a way in which the anti-circumvention provisions that prohibit any distribution of tools which enable the circumvention of access controls could be interpreted to enable action against or prohibition of PopcornTime distros. You have to squint and let the screen go a bit blurry to see it, but I wouldn't count on getting a judge that sees it the other way if I was GitHub. I've always interpreted "access controls" to mean a specific "technological measure" such as CSS encryption, but in a very broad sense the law does allow for tools that don't have any particular copyrighted works in them to be considered illegal and rulings that would disallow their dissemination.