U can never expect that to happen though.
Like tidus said... he did 30 summons and didnt even get a plat. I did 14 summons ones and got 9 golds out of it none of them was the boosted gold. Last time i went for Bernice or Yuyu on 17 summons and just barely got bernice with my last pull (17 summons already is more then 50$). Saying that ... u shouldnt even expect a gold that u want if u spend money even if its more then 50$. On some the shrine just is cruel. And sometimes so random. Never spend money at it expecting something or you might get frustrated and disappointed.