©IDG Communications, Inc. Photo contributed by Matthew Mikaelian.
Deloitte predicts that in 2011 social networks are likely to surpass the breathtaking milestone of one billion unique members. Also, they may deliver over 2 trillion advertisements.
Yet the advertising revenues directly attributable to social networks may remain relatively modest compared to other media, at least in the short term.
With per member annual advertising revenue of about $4, that implies total 2011 advertising revenues of about $5 billion…