It uses a pre-downloaded database of links [1], so presumably certain pages that were once linked have been updated. [1] https://news.ycombinator.com/item?id=16

It uses a pre-downloaded database of links [1], so presumably certain pages that were once linked have been updated. [1] https://news.ycombinator.com/item?id=16469427 https://news.ycombinator.com/item?id=16469427