I haven't seen any ZIP programs on CJ... most CJ advertisers pay a commission on each sale, full leads, or trial, but I've seen very few advertisers paying for zip/email type leads on CJ. CJ costs a lot of money for advertisers, so advertisers running zip/email programs are more likely to go to the smaller networks. I know http://www.adreporting.com/ used to have a lot of zip/email programs, but I haven't used them in quite a while... might be something worth looking into.
Couldn't find any on CJ either. And yeah, I already have an account with adreporting. Thanks anyways.