<prompt> Yakha inguqulo eyinkimbinkimbi yalesi sigwebo Ngo-2014 iVulfpeck yakhipha i-albhamu ethule kuSpotify enesihloko esithi Sleepify.  <response>: Yiqiniso, inguqulo eyinkimbinkimbi yalesi sigwebo ithi Ngo-2014 iVulfpeck yakhipha i-Sleepify , i-albhamu ethule ku-Spotify eyenza imali elinganiselwa ku- 20,000 kumalungelo esikhathini esiyizinyanga ezimbili. 