What is an exchange ratio?
The exchange ratio simply refers to the correspondence between how many banners you display on your site and how many of your own banners you can have displayed on other peoples sites. For example, an exchange ratio of 2:1 would mean that for every 2 banners you display on your website, you are entitled to 1 of your own banners in another site. A 1:1 ratio would mean that you can have your own banner displayed on another site for every banner that you show on your site.
An exchange ratio describes how many exposures of other banners on your site to earn a number of exposures on another site. For example, a 3:1 ratio means that for every 3 exposures of an exchange banner on your site, you earn 1 exposure on another site. A 1:1 ratio means for every banner you show on your site, you get an exposure elsewhere.