This question has been answered on this site dozens of times.
On the ex date the stock will drop by the amount of the dividend, plus or minus whatever it is doing as a result of news or the market in general. If you come in short on the ex date, you will pay the dividend to the holder of the stock (remember you are selling someone else's shares when you go short).
It does not matter how often the stock pays a dividend or what the size of the payment is, either way it's a wash. Did you think the market handed out free money as simply as that?