Can you make more money by adding CPA to your revenue mix?

Three letters many of the online publishers I know love to hate: CPA.

The reason is simple: with CPA deals, the publisher only gets paid when
the advertiser makes money. Although in theory there shouldn’t be
anything wrong with this (we’d all like to believe that our properties
deliver ROI for our advertisers), the reality is that most publishers
don’t feel comfortable with the risk.