Also many of the streams wouldn't have translated to sales. If it wasn't for the algorithm to pick the tracks as background music when the user was doing whatev

Also many of the streams wouldn't have translated to sales. If it wasn't for the algorithm to pick the tracks as background music when the user was doing whatever else, the song wouldn't have been played at all. Similar how pirated game downloads wouldn't translate to sales - often the game wouldn't have been bought at all, and the person would have just done something else with their time.