On July 1, #Spotify released all eight #HarryPotter audiobooks for Premium subscribers, and now People reports that during the first week, there was a 551% surge in listeners of Sorcerer's Stone, with
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Loading velocity curve…
—Views / houraverage velocity since it published
—Peak velocitythe hottest sustained views/hr it ever hit
—vs. their normalpace relative to this creator's own baseline
—Engagementlikes per view — real engagement is hard to fake
—Agehow early Slope caught this surge