The Referral Engine can be added to any package, at anytime.
There are two ways to request this upgrade:
1. Login to http://app.outboundengine.com and click on the tab labeled "Referral Program", and click the "Upgrade to Referral Program" button.
2. Contact our Support Team. Call 888-988-5526 or email email@example.com and we will take care of it for you!