Yes, you can, but please don't make a banner farm. We review each website periodically in our system and if we find out you are abusing the banners in an excessive manner, we will ask you to remove them. We don't recommend to have more than 5 banners total on a website, more than that doesn't convert well. And for earning performance we recommend to use our system on a maximum of three spots. Please talk to your account manager or consult our support team if you are unsure about what you do is acceptable or not.