So who knows, it really depends on who you get when you call. My third comped cruise via mailer I used a spare certificate I had and the obc didn't show up on my invoice that was emailed and I had to call back and get it added, they were like oops I'm sorry, our bad From booking to onboard activities, our comprehensive topics have got you covered for your vacation. My second instant cruise certificate I was extra careful when talking to casino royale and learned that the obc is on the emailed invoice they send you so I double and triple checked and I got the obc as promised Get all your Royal Caribbean FAQs answered in one place. Since it was only 50.00 obc and I was new to the program I let it go They kept on saying onboard that the wording of the cruise next booking was 'dollars off' my cruise and since it was comped, I get zero. My first instant cruise certificate booked with the cruise next deal= didn't get obc even though the booking lady said I for sure had it and I couldn't get it resolved onboard.
I have no experience with Casino Royale, but my complaint would be to them (about Royals handling of their offers). Eventually the 30 days did expire and then Royal used that as an excuse not to honor the offer.
I've heard different stories on this and have a limited personal experience as I've only been prime since Sept and haven't done the prime tier cruise yet but here it is The way I read it, copter DID attempt to book the cruise on several occasions within the 30-day window, only to be given the runaround.