I got that information while talking to an upgrades agent while trying to get an upgrade from an inside cabin. It's a new thing probably not published on their website yet.
That said, I just don't see the value in their standby product anymore. In my case, standby ended up costing a few bucks more than the standard inside cabin rate, I didn't get to choose my cabin, (high deck, as far forward as you can possibly get) I lost out of the free gratuities promo they ran, by the time I got confirmation it was too late to prebook anything, so full price for internet, etc., and I lost at least $150 in military/AARP OBC. (I'm waiting to see if stockholders goes through, but I'm not holding my breath) All that and the anxiety of not knowing is just not worth the hassle.
Regardless, Holland agents were EXTREMELY rude while dealing with this, were dismissive, and one intentionally hung up on me. In two days Holland went from my line of choice, to my last choice and eliminated from all future cruise consideration. It may have just been bad luck, but like always, YMMV. 🫤