Someone said :
Apparently her income would have been significantly higher had her music not been available on Spotify. And being an artist with integrity who's purely in the industry for the love of music she took her stuff down so profits will go up.
That won't happen, or at least not significantly. The cloeset thing we have to a Spotify example is libraries and studies have shown that libraries have virtually no impact on book sales. If somebody wants to buy a book, in nearly all cases they'll just buy it.
The vast majority of people who would want to own Taylor's albums will have bought it. Her income won't change drastically. In fact, if anything, she might lose sales since Spotify and the like have been shown to raise an artist's profile and help sell more.