No-one seems to remember this, but the spreading of the demo is illegal for a simple reason. It contains the Unreal engine, which wasn't paid for. Unless the license to use the Unreal engine is bought by the developers it's an infringement of the creator's (Epic) rights when it's spread. Thus, it's illegal - for 100%, to release it. It's basically developers only but some people decided to get the creators into possible trouble and lawsuits by spreading it. A nice way of thanking them for spending years on developing the game, without any pay. Good job :/.