Adding products from Commission Junction advertisers to a blog has not been one of the easier tasks for affiliate marketers, especially not as posts for individual products.

One way to do it is to use the datafeeds provided by advertisers but you need a plugin like CVSPig or WP All Import to convert the datafeed into posts. And there may be some massaging of the datafeed required to remove unwanted products for example.

I just became aware of a brand