What makes the artists fake is that they are publishing only a couple songs for the specific purpose of providing the streaming platform with royalty free music, and then they disappear. The example pictures in the article show artists that have published 6 minutes and 8 minutes of music. There's also a statistic that 20 people created 500 artists. These artists are shells, facades, illusory, fake. Go looking for them and it's a dead end because apparently all the artist did was publish two songs and dissolve.

The author does criticize the title: "Even the term fake artists doesn’t really do justice to the scope of the situation—because, as we have seen, it’s not the musicians, real or otherwise, who are at the root of the situation, but the dominant players in the industry."

If I were to run with it I'd say the streaming platform is also fake. People buy it expecting a curated playlist of music they want to hear, and instead what they get is a curated playlist of music that sounds similar to what they want to hear.