I just found out from Mike Liebner’s Internet Marketing Blog that ClickBank’s ?tid= referral tracking code is limited to 24 characters, not eight as most people think. I thought it was limited to eight characters myself, and that limitation has been incorporated into the design of my Keyword Transformer Professional Edition product.

Sure enough, ClickBank’s Hoplink FAQ indicates that the limit is 24 characters.

I think that when it was introduced, it must have been a limit of eight, and it presumably has been extended to 24.

David Thomas, http://TheAffiliateMarketer.net/