Which in turn will result in lower sales volumes for you?

For example, dating sposors such as AFF, they have been around for years and almost every surfer i would imagine that has been on the web in the last 2 years has seen one of their ads or signed up for a membership meaning that promoting their sites has the potential to generate less signups.

So, how do you determine which sponsors are over exposed and which are under exposed resulting in less/more sales?

Regards,

Lee