If you are an experienced affiliate marketer or a newbie, you should definitely try Clickbank. It is true that LinkShare and CJ provide affiliate marketers with a lot of products to promote, Clickbank is the haven for products that are sold by both individuals and corporations, which makes some of these niche products easier to sell and allows marketers to gain more commission. In the end, both Linkshare and Clickbank should be tried as you should be selective about the products you are promoting and being a part of both markets would give you a better chance to find that perfect product.