YPN first allowed publishers into their beta program mid 2005, and if you have a financial or business-to-business site, you may be making a decent living with Yahoo!’s contextual advertising.
Of course, the fact that you have to either wait for $100 to build up in your account has turned most publishers off.  But, now YPN [...]

It seems obvious that affiliate marketing can make you money.  However, affiliate marketing can help your business in several ways.
1.  In ValidityYour customers/readers will see the fact that large companies are on your site and assume they bought ad space there.  For that reason, you gain respect from your visitors by merely listing the ads.
2.  [...]

If you’ve ever advertised online, you know how difficult it is to tell which online ad is performing and which is not.
Both Google and Yahoo offer ad tracking capabilities, including conversion counters that tell you when the ad converts (how often a click turns into a sale).
Pay close attention to your conversion rates and [...]