Fair he had heard on the Pensado's Place podcast, where Fair discussed how the cover of "Lady Marmalade" he produced for the film Moulin Rouge! was only available on the film's soundtrack album, meaning that consumers would have to pay for the entire album to get just the one song. Stratton went on to say that "with the technology available, that dictates the packaging of the music—whether it's a three-minute 7-inch or a 40-minute 12-inch or an eight-minute 12-inch single or a 70-minute CD. And now it's Spotify. This is just taking it to the max of short song length and extremely high volumes of play." In 2017, Vulfpeck released the album as a 7-inch single. Track listing Reception Tim Jonze of The Guardian facetiously reviewed Sleepify, stating that the "opening track 'Z' certainly sets the tone, a subtle, intriguing work that teases the listener as to what may come next. It's followed by 'Zz' and 'Zzz' which continue along similar lyrical themes while staying true to Sleepify's overriding minimalist aesthetic. By the midpoint, you realise Vulfpeck are aiming to pull off the same trick as the Ramones: they may only have one song, but it's an effective one." While a Spotify spokesperson had previously considered the stunt to be "clever" (joking that the album was "derivative of John Cage's work," a reference to the silent piece 4′33″), Sleepify was pulled from the service in late-April 2014, citing an unspecified violation of the service's content policies. It was estimated that Vulfpeck had accumulated enough streams to gain at least $20,000 in royalties from the "album", although it was unclear whether they would receive the money. Jack Stratton confirmed the removal with a spoken statement contained within the first track of another, three-song "album" named Official Statement, posted in place of Sleepify on Spotify. The album's royalty-generating scheme received worldwide press coverage, including Spiegel of Germany, Editora Abril of Brazil, The New Zealand Herald, El País of Spain, Komsomolskaya Pravda of Russia, and Time magazine of the U.S. Rolling Stone noted that Spotify still streams the Cage composition 4′33″—a performance piece in which musicians refrain from playing their instruments. A similar concept emerged in June 2015 via a website known as Eternify, by the band Ohm & Sport, which allowed users to play the first 30 seconds of any Spotify song on a loop, thus accumulating royalty payments for the artist.