I'm no adtech expert but I suspect that potential customers would form mental associations between two things that often show up together, like pro-Nazi content and the ads I'm sponsoring, and I wouldn't want that.
Yeah, right, they see Apple's ads 24/7 in all kinds of mediums, and alonside 100000 tweets of all persuassions, but it's the 100 tweets most wont even ever see, unless they follow those people, that they'll make associations with the brand...
coldtea|2 years ago