The true album sellers like Adele and Taylor are ****ed with this ****. Adele could suffer more because most of her album copies sold there at the US are physical.
That's still not impressive and she's not powerful as Katy or Beyoncé there. Even LDR is more influential than Adele on Spotify.
You're aware that 21 wasn't on Spotify until mid 2012, right? Spotify has since exploded so I wouldn't be worried about her streaming power at all. ITunes track sales will be much more important because 10 sold tracks equal 1 album sale on the New BB 200, compared to 1500 streams that equal that.