From their website:
"Every time a song you bought sells, you get a cut of the proceeds. Earlier buyers get more, so it pays to be a trendspotter."
Rolling Stone describes it as "stock market-like method to lure people toward its service."
How it works: Popcuts takes in a 10-20 percent cut of each purchase, then leaves it to the artist to decide their own percentage. From there, the rest of the earnings go towards the users’ accounts.
But currently their catalog has only 200 obscure artists and roughly 700 songs.