The reason I won't list them if you can not click back to the site in one click is because surfers are curious and stupid.
They either click the sponsor link because they are curious and don't want to buy at them moment and want to click back.
Or they are stupid and hit the wrong link and want to click back to the site. If they can't click back to the site they probably won't come back I've lost a potential bookmarker and a potential sale for one of the sites where he or she may find something they like.
