When the banner was put on the fortunejack homepage, it could be clickable.
I don't see why any website banner couldn't be clickable. Just need to be set with a link to direct those who click on it.
You could have just tried to click one of the current banner in the homepage and you could see that it will redirect to the promotions page there so I could say that their last banner of the 20 % lost was clickable as well
I did try to click on the banner in question.
I tried right away, when I was curious about the loss back.
Then I tried again when I saw your post suggesting I click on it.
I even tried one more time, just a minute ago.
Everytime I clicked on it, nothing happened.