Spotify their favourite artists, as well as music, review, and concert recommendations based on listening history. Users can add all tracks to a "Collection" section of the app, rather than adding to a specific playlist. The features were announced by CEO Daniel Ek at a press conference, with Ek stating that a common user complaint about the service was that "Spotify is great when you know what music you want to listen to, but not when you don't", adding that "20,000" new songs got added to the service on a daily basis. "You're fighting with 20 million songs on Spotify", Ek
Rdio and the aggregators BFM Digital, Catapult, CD Baby, Finetunes, INgrooves, and The Orchard. Rdio also offered social networking features, such as the ability to share songs, albums, and playlists with others on Rdio and social networks such as Facebook and Twitter. On November 16, 2015, Rdio filed for chapter 11 bankruptcy in which they had to pay $200 million and announced the sale of certain intellectual property to Pandora Radio. The purchase price is $75 million in cash. Rdio was launched by Skype Technologies founders Niklas Zennström and Janus Friis on August 3, 2010. At the time they had to