Can someone confirm if we can use these NCL onboard credit, https://www.ncl.com/shorex/271784528/56587201/gifts-detail/603 for gratuity? These were purchased by my TA and I was told that I can have these applied to our gratuity by telling the front desk to hit the daily gratuity to my onboard account. However, when I called NCL, they told me that these credits can't be used for casino, gratuity or excursion? Have anyone recently used these for casino and/or gratuity?