Seriously? According to the article, their only "proof" is that four criminals said "oh yeah I do this trust me bro". This qualifies as "investigative journalism" today?
In either case, Spotify (usually, afaik) doesn't pay out for the actual botted streams, but it doesn't matter. The money is made by the scammer from the artist.
Same article mentions further down that the Police have also basically confirmed it is an issue but Spotify aren't acknowledging them.
I imagine that there might be some degree of truth to this story, but as it's written right now it's pure clickbait.