Instagram introduced direct picture messaging at the end of last year, but up until now we haven’t heard much from the Facebook-owned app about how well the new feature is performing. According to a report this weekend from TechCrunch, 45 million users are actively using the Direct capabilities, which is a sizeable chunk of Instagram’s 200 million-strong user base. Instagram Direct takes on one-to-one services such as Snapchat as well as giving users a way to share photos among smaller groups rather than all of their followers at once. “There are… moments in our lives that we want to share, but that will be the most relevant only to a smaller group of people — an inside joke between friends captured on the go, a special family moment or even just one more photo of your new puppy,” said the blog post introducing the feature. “Instagram Direct helps you share these moments.”