Implications

In our data set, churn behavior accounts for $67\%$ of the non-static fragments, with $33\%$ exhibiting scroll behavior ($K>1$). Based on these findings we conclude that about a third of the dynamic content on high-quality web sites behaves in a scrolling fashion. The prevalence of scrolling content points to the inadequacy of models that only account for churning content, including the ones used in pervious work on recrawl scheduling.