You mean has Google ever lost data? I'm sure it has. Has Google ever "undertargeted" ads? Obviously yes. Every single outage in an ads system makes it target l

You mean has Google ever lost data? I'm sure it has. Has Google ever "undertargeted" ads? Obviously yes. Every single outage in an ads system makes it target less well, basically. And there was that time Ads preferences for basically everyone seemed to indicate that I (along with everyone I knew) was interested in "Raggeaton", whatever that is.