Looking for the payment processor that the 14-day free trial CPA offers use. That will charge customers full price if they don't respond within 14 days and will recur payments monthly. Anybody merchants in here?
The majority of them use multiple aged merchant accounts from different vendors. If you are looking to do this you need to find companies that process credit card payments online and allow you to charge the customer on a reacurring basis. Try authorize.net or a processor like that for what you need.
Pretty much any online gateway for merchant accounts can do recurring billing with a trial period & cost specified. One company I've used in the past for a merchant account and gateway is CDG Commerce - http://www.cdgcommerce.com/free-payment-gateway.php