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.

25 percent of your user base isn't terrible — that's 45 million people using one feature, after all, and parent company Facebook has certainly had less successful product launches — but it's far from a runaway success for a feature Instagram dedicated an entire event to announcing. Also, Direct is championed prominently in the app's top-right corner, but perhaps the other 75 percent of users don't know what it is, or haven't found a use for it.