Schaeffer's Weekly Options Countdown subscribers scored an impressive gain with our Block Inc (NYSE:XYZ) weekly 9/5 79-strike put recommendation. In fact, investors quadrupled their money in less than a week, so it's time to dig into the drivers behind this winning trade.At the time of our recommendation on Sunday, Aug. 31, Block (XYZ) had been stuck under $80 for over a month, with three rejections resulting in lows around$73. It seemed like that could roll over, though, as fintech peers stalled out.What' ...