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Are you on iPhone? It's easy to scroll up on iOS (tap the top bar), but hard on Android. That might be one reason why sticky headers are popular.

• threesixandnine 9y ago
  No, sticky headers are popular because site owners hope for people to browse the site some more.
  • untog 9y ago
    And people do use them. My theory is that analytics is to blame for all of this. You can track how many people clicked the button in your share header. You can't reliably track how many people left because of it (there could be a million reasons for leaving the page). So your analytics shows an uptick in engagement by X%, and no clearly discernable downtick. So the header stays. All it would need is an A/B test or two, but easier said than done...
    • pastelsky 9y ago
      a.k.a survivorship bias
    • deleted 9y ago
      [deleted]