Is this an April Fool’s joke? Why would Macy’s do something silly like this? What would dressing manequins as a Pope have to do with selling merchandise? Are they selling Pope outfits now?
Just as a guess, and knowing something about marketing in the entertainment and retail businesses, I'd say that Showtime is paying Macy's for the advertising space. Getting press attention for the show by getting a few people angry is gravy for Showtime--like the Fox Network's early days, they're trying to make a name for themselves by being "edgier" than their rival HBO.