I have heard quite a lot of jackpot winning stories not sure I have heard a great number of those winners say it was as a result of their accurate prediction skills emanating from their strategies that got them such win. It's mostly a tale of  luck and chances. We don't determine when to win, it randomly happens and in few cases we could be lucky to get a streaks of wins at a session yet I can't base that on accuracy of prediction effect because it was never determined as at the time of betting.