I have a system called Internet Automater.
www.Internetautomater.com The solution allows you to easily connect Infusion (or any othe CRM that can merge and send email, including MS Outlook.) to your SOC account. I have templates already prepared for Infusionsoft. All you need to do is create a new task template and paste the body in. There are a few fields that need to customzied to your account and card campaign.
IA will add contacts to SOC, if needed, send cards when instructed, and even let you know when your SOC balances are below your set limit. For an automated marketer, it only makes sense to use Internet Automater to send cards.
Call me at 866-343-2345 for a full tour.
Ryan Malham