Hi I was wondering if we can create ad campaigns for example a clickbank affiliate url and they will be redirected to the salespage?
Yes, it depends on the TOCs of the affiliate program. You do need a business Adwords account with a VAT ID, though.
If you do it, it means that you must advertise for the website you are affiliate. For example, if you are affiliate with amazon, you will have to advertise amazon.com and link to your affiliate links. But you also have to consider policy and TOS of your affiliate website
Back end of 2009 it seemed a lot of affiliate advertisers on Google were being dropped from Adwords. Did they change their policy on that?