"50 impressions... out of 5.5B over the whole day" Note that he isn't rebutting the fact that these ads were served alongside Nazi discourse. He's merely sayi

"50 impressions... out of 5.5B over the whole day" Note that he isn't rebutting the fact that these ads were served alongside Nazi discourse. He's merely saying that their evidence-finding mission comprising 13x the pageviews of a typical user was not a significant fraction of Twitter's traffic. For a study like that, they'd need access to the firehose (and pay through the nose).