Why is "On the Pyre" not as successfull as the debut?

To be clear i truly enjoy the album,i feel it is even an improvement over the debut.It kinda saddens me to see that at least streaming wise it is not close to the debut's success.Of course scoring a mega hit like "Nothing Matters" for a second time is hard but after 5 months only the "killer speaking" has surpassed 10 million streams while 7/12 of the debut has over 20 millions streams.