During the first 2 days there were 1 million registrations, but Ping suffered from spam’s problem
After less than two years Apple and his new CEO, Tim Cook, decides to shut down Ping in the next Itunes update.
Failure is part of the history and development, but only the big companies know how to admit failure.
Even Google fails with its Google Wave and Google Buzz and It decides to shut down both services.
On Apple’s future there will be Facebook. Greater integration with the popular social network and Twitter, will bring a wave of users, that Ping alone would never be able to obtain.