If google where to just use bounce rate as a ranking measure, that&#x27;s fine -- if interstitials increase bounce rate, then site owners will have to determine for themselves whether it&#x27;s worth the price.  otoh, deciding to arbitrarily lower the rank because they don&#x27;t like a particular type of advertising is exactly anti-competitive.<p>So ranking measures derived from user behavior: great.  Ranking measures designed to prioritize features in your browser, or to push people away from apps (that, just by total happenstance, your dominant competitor does better than you, and which threaten to undercut your dominance in search&#x2F;display ads): not fine.  Which really is classical antitrust: you can&#x27;t use your monopoly (search) to juice your other businesses (browser, app store).