You are given 500 free RVM drops when you set up your account. Once they are exhausted, you will need to purchase more drops.
You will know your drops are exhausted when you receive notification in your dashboard.
Click where it says "Click here" inside the alert message. This will take you to an order page where you can select a voicemail drop bundle. These bundles come in different sizes with volume based pricing.
Select the package that will get you the volume you need to generate more deals. Next enter your payment info on the checkout screen.
Select Get my drops. That's it!