BY aarrieta
The impact growth of advertising based on Performance compared to the based on CPM where the last year 57% of all online advertising was based on performance (CPA and CPC) while 39% was based on CPM. This difference grew from a 6% in 2007 to a 18% in 2008 and it is expected to grow more in 2009, taking into account the crisis as a factor that increases this trend.
This is stated in a study conducted by IAB together with PW&C that has just been launched where they analyze the revenues obtained by the industry in 2008. The study was widely published, but I believe that it was worth including it.