Description:   Worldwide social network ad revenues are still going strong and set to grow nearly 50% this year, according to eMarketer estimates. Source:  eMarketer.com Date: 02/24/2012 Link:  http://www.emarketer.com/Article.aspx?R=1008862 Questions for discussion: What explains this rate of growth? At what point do you think it will level off? How should marketing managers deal with this information?