Some themes integrate nicely with ThirstyAffliates and allow you to create many different displays of your links on the front end.
Unfortunately, out of the box, ThirstyAffiliates doesn't have Featured Image support which some of these themes need to get their display looking right.
To quickly add support for Featured Images on your affiliate links, just add this snippet to your functions.php in your theme:
add_post_type_support( 'thirstylink' , 'thumbnail');