Why not contact a cruise specialist and have them take over the booking? Then they will get any price reductions for you without your having to run around looking at various websites. RCI isn't going to let you move your booking around from place-to-place whenever you find someone else offering it for a lower price. Places offering OBC are selling group space, in which case you have to book the cruise through them and not move an existing booking to them. Price reductions are supposed to be uniform - meaning if you see your cruise price drop $100 on some website, that price is also offered by RCI to any other agent. Also note that some prices are available only for new bookings and cannot be applied to existing bookings.