I think it’s very difficult to determine which suites are available for RoyalUp by looking at which suites haven’t been booked. As the bids are awarded, some passengers in the cabin type you’re bidding on may win their bids to higher categories, thus opening up the suites they had originally booked.
By the way, although I have 53 cruises under my belt...I’m brand spanking new here. I love the info on this blog...