messages to all followers

In the past couple months, my publisher's follower count has, like, quadrupled or more. It's awesome. But to be honest, we haven't really capitalized on the sheer number of people we could reach through this platform. 

We've had one-on-one messages between fans and followers pretty seamlessly, but is there a way to address a message to ALL followers at once for occasional big announcements like new titles, crowdfunding launches, creator news, and stuff like that? I've tried searching through these forums and the Discord to the limits of what's intuitively obvious, but haven't found it discussed.