Keep in mind with the new RCI policy of "only one bite of the apple" you cannot combine booking on board, next cruise letters, Platinum/Diamond balcony discounts, stockholder's OBC, etc. for multiple OBC. You can only have one. To me, it doesn't make much sense now to book while on board or buy a next cruise letter when I can get the same OBC amount by holding stock. If they discontinue that perk which is likely, then I will fall back on the balcony discount or a WOW sale.
Tucker in Texas