This module seems perfect for recurring billing with authorize.net... however, I'm stuck at trying to implement a FREE-trial prior to the full monthly cost.

if you try to do a $0 charge (for CC verification for FREE trial followed by recurring billing), it won't go through authorize.net

I've been told that the ARB method below (they also have an API) has the ability to do a FREE trial, followed by recurring billing...

I beleive, this would have to be done via the specified API below, since authorize.net doesn't allow a $0 charge? or can this be done with this module? (i.e. add this api functionality)

any ideas?

**********from athorize.net ***************

Automated Recurring Billing (ARB) Service Help
Click on the links below to create new Automated Recurring Billing (ARB) subscriptions, view the status of subscriptions that you have added or uploaded to the Payment Gateway, search subscriptions, and configure ARB service email notifications. What is Automated Recurring Billing?

Create a New ARB Subscription
Add an ARB subscription to the Payment Gateway.

Integrate a Web Site to the ARB Service
Use the ARB application programming interface (API) to create your ARB subscriptions directly from your Web site or proprietary application.

File Upload Capabilities
Enable the Upload ARB Subscription Files feature for your account.

View Status of Uploaded ARB Subscriptions
View the current status of ARB subscription files that have been previously uploaded to the Payment Gateway.

Search ARB Subscriptions
View and edit ARB subscriptions.

Configure ARB Email Notifications
Select the ARB email notifications that should be sent for your account including a daily transaction summary and notification of upcoming credit card and subscription expirations, failed transactions, and subscription suspensions and terminations.

Discontinue the ARB Service
Terminate your ARB service agreement.