The picture is different for mobile display. Facebook is the leading player there, and will rake in just over one in three mobile display dollars this year, after traffic acquisition costs (TAC). Google will increase its share of the total to 19.6%, while Pandora will grab 11.1%, down slightly from 2012. Twitter is a more significant force in the smaller world of mobile display, though it will still only take in 7.9% of revenues this year. Read the rest at eMarketer.