I have been doing some keyword research and found a few that I am going to target. One of the keywords I'm targeting has a couple of other affiliate websites competing on the first page of Google. I opened one of these websites and they have a table with about 25 items for this keyword. The thing is they only have affiliate links for the first five. They have many pages where they talk about a product, but have no affiliate link at all on the pages. Amazon affiliate links is the only money making thing on this site.
Is there a reason that I don't know about why this person wouldn't have inserted more affiliate links?