Instagram has finally offered some real data about the usage of Instagram Direct, the private sharing feature it launched last December. According to Fortune, over the past month 25 percent of Instagram users have sent or received a message using Direct. Instagram Direct is charming in its ambition that each private conversation should start with a photo — the currency of Instagram — but clearly something isnt resonating with users as a whole. Part of the problem might be that Instagram Direct doesnt make starting conversations so easy.