Reason Digg faded was that Reddit decentralized moderation across subreddits. Although there are still some global rules set by Reddit (no drug sourcing is one I personally disagree with). https://github.com/LemmyNet/lemmy is federated Reddit. It's also open source just lacks community. Some things are also already better like more performant front end. If I was to bet on something to overtake Reddit, it would probab…
What ultimately killed Digg was the disastrous "Digg v4" redesign in 2010. Reddit's features helped it capture the fleeing users, but it was ultimately Digg's actions that triggered the mass migration, and Digg never really recovered.