I'm sure we'll know "the meaning" of diary when it ends. (I thought it is obvious - a journey through key moments of her life, somehow crossed with album eras, final chapter will lead to Anti, also can be seen as #decadeofRihanna celebration), have some appreciation, really, sometimes you just spoil the whole momentum with your "I can't understand, too complex, why won't she give us a single/an album" etc
This campaign vibe is even more of a mystery (and effort) than Rated R one (if someone out there was a stan in 2009 and remembers it, he'll get), a masterpiece. Unapologetic and TTT ones were great as ideas too, but seemed much more... quickly-made or how to call it