Is there any way from which we can know (within clickbank) from where is the traffic coming from it? For example, if it is coming from google, or ezine or from any other website ? Does clickbank facilitates that? Another question is that I have read a few people making a new account on clickbank and reporting an improve in sale. I would like to know what exactly are they doing here? Are they making a duplicate account with same details (name and address) as the first one, or they are making a separate account with another persons details (like their wife or parent's). Also is duplicate account allowed by clickbank ?
For the first question i think that you can fix it somehow with Tracking Codes, not quiet sure so take this just as a hint. For the second part really sounds interesting so i would also like to know how is that possible.
you can do it using this format: http://affiliatename.publishername.hop.clickbank.net/?tid=tidcode then in your clickbank stats you sort em by "tracking Ids"