To convert an affiliate link to a link that appears to be from your site you could use a simple file like this one that would send the visitor to the http://www.slotbonuses.info/ site
File name example = bonus.php
File code
//Include your affiliate link below
header(“location:http://www.slotbonuses.info/”);
exit;
?>
Plus you can also download the casinos banner to your own site and then name it whatever you want. Then when they change the affiliate link structure, their domain name or you decide to promote some one else you just change your files ( bonus.php & casinobanner.gif ) without changing any page coding.
This is of course just the basics. You can find many more elaborate versions and added elements.