StumbleUpon
A toolbar button that sent you to a random page picked to match your interests. The internet's channel-flick, from before feeds took over discovery.
The service launched in 2001 in Calgary with Garrett Camp among the founders — the same person who later co-founded Uber. The model was simple: tick the topics you liked, press Stumble, get a page. Thumbs up or down trained your recommendations and fed the collective's taste at the same time. The difference from today's feeds was that you actively requested the next thing rather than scrolling an endless stream, and that what you got was usually somebody's own website rather than a platform post. eBay bought the company in 2007 for $75 million and the founders bought it back in 2009. It closed in June 2018 with around forty million registered users.