With Zynga's S-1 boasting of $839M in 2010 bookings, former DoubleClick CEO Kevin Ryan claims...

|By:, SA News Editor

With Zynga's S-1 boasting of $839M in 2010 bookings, former DoubleClick CEO Kevin Ryan claims Facebook is on its way to generating $1B in social gaming revenues this year. eMarketer sees total ad spending on Facebook exceeding $4B in 2011.