The role for any affiliate is to maximise the amount of people that come through their site and ultimately follow the links to external websites. If people don’t click on the links the affiliate marketer makes so money, thus making it in their best interests to make the visitors follow their links. Without people clicking on them the affiliate makes no money and depending on the type of site they have designed, whether specifically to produce money as an affiliate or to just be a personal site, is dependant on how important this is. For sites designed as purpose built affiliate sites, it fundamentally undermines the sites primary goal if they fail to make money from it.
Even when a visitor comes to an affiliate marketing site there is no guarantee that they will decide to click on the link. In fact the majority of those who do probably will not. Therefore the odds of somebody clicking on a link and becoming a member of the site are increased many fold the more people a site can attract. If only two out of every 100 visitors become fully signed up casino members then it makes sense that a site, which can attract 200 people a day will attract more people than one...