34. The medium of claim 27 , wherein the instructions further cause a machine to aggregate output signals from a plurality of viewers.
34. The medium of claim 27 , wherein the instructions further cause a machine to aggregate output signals from a plurality of viewers. 37. The medium of claim 34 , wherein a first set of the plurality of viewers are viewing the media instance at a first time and a second set of the plurality of viewers are viewing the media instance at a second time different from the first time.