Here’s how to enable usage based billing for your account:
Go to your Subscription page.
Click Manage Subscription.
Use the Usage based billing toggle to turn usage based billing on or off.
A pop-up will appear asking you to confirm that you want to enable usage based billing. You can either set the number of credits that can be used to Unlimited, or enter your own maximum.
Click Confirm to save the changes.
You may be asked to verify your payment card before proceeding, but no charges will be made during the verification process.
For more information about usage based billing, please see: