Dear Jeff,

Even when you send out your referral link before launch , the referral will be tracked by clickbank and even any affiliate link will track the referral . How this works is usually a cookie is set on your browser . Click bank cookies usually remain good for 60 days and other referral link cookies are based on how they programmed it... The thing is the referral hold good only when the same browser is used for purchase.. and with respect to promoting you can promote as soon as you sign up as JV Partner as its always better to promote a product well ahead than somebody does. Hope this helps..

Thanks & Regards,
Karthik Ramani