What is this update to update this underneath each of your

What is this update to update this underneath each of your WPMUDIV plug-ins in WordPress? Most of him when I click it I have to subscribe to a service to update. But for the business directory takes me to the business directory page where there is an update but all I can do is download it. It won't update the plug-in. Are you charging people just to make it easy for them to update the plug-ins? Or is this a real service and a real product that we get? And why isn't business directory automatically updating like every other WordPress plug-in?