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
Slacker in the use of "slacker" from its draft-related meaning to a more general sense of the avoidance of work is unclear. In April 1948, "The New Republic" referred to "resentment against taxes levied to aid slackers". An article tracking the evolution of the meaning of the term "Slacker" in defamation lawsuits between World War I and 2010, entitled "When Slacker Was a Dirty Word: Defamation and Draft Dodging During World War I," was written by Attorney David Kluft for the Trademark and Copyright Law Blog. The term achieved renewed popularity following its use in the 1985 film "Back to the