Most landing pages benefit by having a photo. It could be of a person, the product, a person using the product, a before and after, a metaphor, a juxtaposition, an object of desire, a symbol, brand images, something funny, dangerous, shocking, or some other emotional content.
After testing many options, my conversion rates improve with pictures of people, or a person. Ideally the emotion of the person in the photo is showing the end result, or feeling that comes with using the service, or owning the product.
If the advertiser didn't provide any photos or product shots on the affiliate network's offer page, make your own. One way is to visit the merchant's sales page and take screenshots using Snagit or your favorite image capturing software.
If they do not permit using screenshots, use a stock photo instead. My favorite source for stock photos is 123RF.com. They have exact same photos, by the same photographers that the expensive services have, but at a fraction of the cost.
I don't mean a similar less quality photos. I mean the exact same image by the same photographer! Plus, if you buy in bulk, you can still get small photos for use on the web, for under two dollars each.
There can be no transforming of apathy into movement without emotion.