They set up in areas and clutter them up
I found this to be a problem on the Serenade. Big time. And some of the artwork was really ugly and awful and offensive and overpriced. And the free champagne isn't that good.
I guess Park West and RC are making money or else they wouldn't do them. I went to some on the Grandeur and some people bought several pieces and they weren't cheap.
Are there auctions on other cruise lines?