Business Insider takes a look at the story behind Facebook's pricey acquisition of LiveRail in 2014 and its high hopes for using the acquisition to make video advertising better. In the 21 months since the acquisition, BI notes that the LiveRail Central RTB marketplace Facebook inherited has been "tapered down and a significant amount of ad inventory removed"; a mobile native ad and mediation product that was announced never got out of testing phase; LiveRail announced in January it was exiting the ad-serving business; the majority of LiveRail salespeople now have titles in Facebook's "publisher ad tech group"'; and sources …

Despite the furor over ad blocking, a report by comScore finds that ad blockers are employed by just 10% of U.S. desktop users. The data in the report was collected in December from comScore’s panel of around 1 million U.S. desktop users. It reflects a slightly lower rate of adoption and escalation in the use of ad blocking than data from some other companies that have made headlines in recent months, according to a report in the Wall Street Journal. The comScore report shows that the overall rate of ad blocking on desktop in the U.S. was "relatively stable …