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I see many problems trying to do this:
1) No automated sign up process for affiliates
2) Either you give them unfettered access to the tracking or they are required to just trust you.
3) Once a person can see the conversion tracking, they can easily abuse it by simply loading the thankyou page and creating false positives
4) Affiliates can see other affiliate marketing strategies and copy or obstruct other affiliates.
I'd use something else.