Brands tell stories with a beginning and an end. Luxury brands tell stories that let you supply the ending. And it can be those kinds of stories that get under people’s skin. That invite them to play with the story, in their heads and thankfully, online. We’re six years into an enigmatic campaign that has been spoofed across late night TV, spurned dozens of recreations on YouTube, been debated on newscasts, and even made it to Jeopardy as a clue. (That’s a nice ROI.)