We’re still trying to draft the rules for this scenario where a cup gets knocked over. As of now, though, we’re leaning towards it counting as a hit – most of the time (and of course you can catch the cup to save the beer).
Reasoning: most of the time I’ve personally seen a cup fall, the shot most likely would have hit. Therefore, we’re probably going to count it as a hit UNLESS it is clear that the ball had no shot of going in. For example, if a guy fires one off that hits the bottom of a cup, knocking it off the table, that’s not a hit cup.