The following two sponsors have "FREE PASS" type marketing. Eg. "YOU GET A FREE LIFETIME PASS TO BLAH.COM, with your one month purchase to blahblah.com"
Traffic Cash Gold
Stiffy Cash
Cybererotica's FREE and Follow-Me FREE programs give the surfer a free 3 day trial, which if not cancelled, get billed $39.95
There are also several free AVS'es, including the brand new
FreeAgeCard and
FreeNetPass
Bruce