Cant use shreholder OBC for casino. See below:
This benefit is available to shareholders holding a minimum of 100 shares of Carnival Corporation or Carnival plc. Employees, travel agents cruising at travel agent rates, interline rates, tour
conductors or anyone cruising on a reduced-rate or complimentary basis are excluded from this offer. This benefit is not transferable, cannot be exchanged for cash and, cannot be used for
casino credits/charges and gratuities charged to your onboard account.