Digg's decline, IMO, is due more to the efficiencies that have been created centered around URLs as a currency. Digg first became popular because its up/down v

Digg's decline, IMO, is due more to the efficiencies that have been created centered around URLs as a currency. Digg first became popular because its up/down voting was somewhat novel, and it reached critical mass. It became the place to get fresh URLs. Nowadays, it's nowhere near the monopoly on fresh links it once was. URLs spread like wildfire on any number of social media sites (reddit, google/yahoo buzz, delicious, twitter, etc), and derivatives of them (popurls, alltop, etc). You no longer need to visit or take part in Digg to reap the rewards of having fresh content delivered to your doorstep everyday.