The 49 percent increase in bad ads blocked outpaced Google’s overall advertising growth. Clicks on its ads grew at a slightly more leisurely pace, rising 23 percent from a year earlier in the third quarter last year. But we don’t know how many bad ads slipped past the 1,000+ Google employees charged with detecting them, nor how many advertisers simply moved to other advertising networks with less sophisticated detection systems or fewer qualms. Google blocked 12.5 million ads that violated its healthcare and medicines policy, up from 9.6 million in 2014.”]