> It looks like there may be big differences for display ads (2-3x?), but for search?
Keep in mind that display ads are wildly ineffective to begin with. Targeted ads may raise your click through rate from 0.2% to 0.6% but that isn't good enough to justify the massive privacy loss and use of bandwidth, server time, engineering talent, etc...
Keep in mind that display ads are wildly ineffective to begin with. Targeted ads may raise your click through rate from 0.2% to 0.6% but that isn't good enough to justify the massive privacy loss and use of bandwidth, server time, engineering talent, etc...