They probably got them. The problem is that it's difficult to repeat, thanks to temperature, meaning users will get a random spread of outcomes. Today, someone got a legal game. Tomorrow, someone might get a grandmaster level game. But then everyone else trying to repeat or leverage this ends up with worse luck and gets illegal moves or, if they're lucky, moves that make sense in a limited context (such as related to specific gambits etc) but have no role in longer-term play.