Like Reddit is? e.g. for Google, or Bing (shudders), you know. Search engines. One of the ways many people around the world interacted with Reddit was looking up solutions, discussions, or similar from a search engine and NOT on Reddit itself. Is that possible in this thread of the fediverse?
There was extenstions that allowed you to click a button on someones name and see what subs they were active in at a glance. There was also websites you could put a username into that showed detailed history of how that user interacted with reddit. What they subed to, what times they were active, sentiment analysis on their comments etc.