There are a lot of us on the 2024 South Pacific cruise who booked the 2025 when it came available with the early booking bonus so I think a lot went with the CO and upgrade on cabin including us. (Just my thoughts).
Not sure what ideas to give you, sorry. I’m sure others will chime in that have more experience regarding booking CO. We’ve only ever had it when in a Neptune suite but for 2025 we booked the lowest Vista suite & upgraded cabin with CO.