in my experience, clickbank products convert less than free offers. Try CPA offers (email/zip submits)
hmm does click bank offer cpa ads?Cost Per Action. Google and the Search bar are going to be the only things that care about giving you the right answer.
CPA Tank
or if you want something incent exclusively - adscendmedia
Clickbank is not really ideal, but if you can drive enough traffic to an offer, you may get the cpc as a simple email submit.
Bro stay away from clickbank if you want to use instagram to earn money..CPA offers is the way to go but you would need a good CPA Network that accepts IG traffic.. =) Good luck!