Below are two example banners. Each time a banner is displayed an advertiser is selected at random, then one of their banners is selected at random. If an advertiser runs out of credit then they are removed from the list of active advertisers. This random display technique increases click-throughs and advertising variety, allowing you to have more advertisers than you do AdSpace. If you have a major advertiser you can choose to give them a permanent space while still recording clicks.