Whether the store page is visible. A publisher might want to keep the page up to direct users to a newer title that deprecates the old one. Or they might hide a

Whether the store page is visible. A publisher might want to keep the page up to direct users to a newer title that deprecates the old one. Or they might hide a page if they no longer have rights. I also noticed that Prey (2006) is delisted to presumably avoid confusion with Prey (2017).