Booking onboard

During the cruise, I know there is a place you can book a future cruise. Is there any discount? Or do they just go with the prices set on the DCL website?

10% off the "cruise fare" portion of the ticket (no discount on the tax and government fees part} plus an onboard credit based on the length of the cruise. You can also purchase a "future cruise credit" where you can assign the date later--any time within 2 years.

Booking on board gives you 10% off the cruise fare (except concierge rooms),

on board credit of either $100 (3-6 night cruises) or $200 (7+ night cruises) and reduced deposit (10% instead of 20%) for 7+ night cruises. If you book a dummy (placeholder cruise), the deposit is only $250 per stateroom.