When the item is used, it will produce 10-25 platinum coins according to your faith skill level. The item says it can be used every 72 hours. While it CAN technically be used that often, it will only produce the platinum coins once a month. The coin rewards reset on the first of every month no matter how late in the previous month you used it, HOWEVER, the 72 hour cooldown will still apply. This means that if you used it at noon on the 30th of one month, you won't be able to collect the rewards until noon on the 3th of the next month.