Because i did not have my own landing page, i referred visitors directly to merchant site via my affiliate link. As far as i know, it is allowed. Or i am missing something? My display URL was the same as a destination URL, although affiliate link was used.
They don't suspend for direct linking. That's a myth and repeated by those who don't understand. The landing page however, whether your own or direct linked, has to follow all rules and guidelines. So know them and study the affiliate's page before sending traffic there. If any doubt, don't do it. The problem of course is that you cannot change the affiliate's page yourself.
I did that also When trying to promote a COD blackops guide from clickbank i used to redirect my site to the affiliate link then when i added my voucher they suspended my account .. So i copied the the whole Vendor's site and Pasted it into my wordpress 1 column page and Pointed the Add To Card Buttons to my affiliate links And then i made anew account on adwords and used anew voucher And Now its working and iam getting over 150 click per day . But No sales till now :S
your case is same with me.. using direct affiliate link from clickbank and the result is banned. the second attempt, i try using landing page for my amazon affiliate site (landing page) and got banned either. So frustating, but this is the best place to get some targeted traffic