A conversation with a colleague started me thinking about the immediate future of the co-registration marketing industry.

Co-reg is the practice of connecting leads or other sorts of sign-ups with another registration process. Robert Puddy of AdvertisingKnowHow.com describes the two ways that co-registration might occur:

Visitors signing up for a free subscription or other service are offered the chance to opt-in to other offers on the “thank-you page” that appears after the initial registration.

Visitors to a site are