Droppy Premium Subscription allows your Droppy users to get more out of your service. They will be able to subscribe to a premium plan, which will give them additional features such as larger file uploads, longer file storage, no ads, and password functionality. The plugin will charge the user every billing cycle (you can set your own price, billing cycle, etc.) and check if payments are made successfully. Users can easily unsubscribe/re-subscribe using their own control panel.