Most of the Conquest class ships sell next cruises. I dont know why the Glory doesnt, they seem to be the exception. I dont know that they ever had a next cruise desk onboard?
You get OBC on a future cruise, $50 for 5 day, $75 for a 6 day, and $100 for a 7 day. The sign says "up to $200 OBC, but for practical purposes, I dont even know of any cruises long enough to get $200 OBC.
If you book while onboard, they will give you two vouchers for your friends and family, to book two more cabins and get the same OBC if they book the same cruise you did.
Now that the Welcome Back credit is going away, I will be using them for all my future cruises I book. I have 3 unused certificates. So far I only used one, because I was told I couldnt use them on cruises I have already booked the prices went up on, they have to be ones the price hasnt gone up on before the certificates can be applied to already booked cruises. .... hence the fact Iv only used one, so far, but I will be using the others. np. You do have to snail mail the certificates in to get them applied when you book a new cruise.