Just do the $10. You have to get whitelisted for doing clickbank, apply and show your site and explain how you plan to market it. If you're not really going to market it and you just want the discount ... $10 is the easiest.
There are people who are whitelisted I've seen who give kickbacks, but anyone can get their money back from clickbank for 2 months, so they don't give you the kickback for two months (and until then, you've paid an extra $10 while you wait) ... not worth it, just buy it with the $10 discount.