The 'sticky' trend you are talking about is labeled 'viewability' - its now a key metric for online advertising, and one News perform well with to be honest. Its also why Fairfax re-jigged their whole site late last year. Its about how much of the ad is in screen, how long for, dwell time, etc. We will likely be able to trade against it in the coming year or so - we already get judged upon it as a delivery point.
BIG Price at posting:
$2.22 Sentiment: Hold Disclosure: Held