The problem is that most Internet users don't fit into this bucket. They have things to discuss and share with a small group of family/friends but beyond that don't have much to say, to the broader world. These are the users that flock to Facebook, Snapchat, et al.
Until Twitter finds a way to engage the everyday average Internet user then they'll struggle to grow or create a meaningful value proposition (the $$$ is in advertising to the masses, not the engaged thought leaders).
The data on users indicates Twitter has likely peaked in terms of attracting these engaged users (data also indicates a lot of these "active accounts" are fake / bots / spam). Until that changes Twitter will be in trouble as it has no viable long term business model.
