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I don't get it. What does it do?

From the site: "Musicians you love listen to what you like" ... "Their favourite tracks become your personal radio..."

Oh I get it, it makes a playlist out of the music that artists you liked have liked.

let me know if you find something else unclear ;)

Why not just go to soundcloud.com/artist/likes and click play? That already makes a playlist of their likes...

That doesn't include multiple artists at the same time, right?