The standard challenge is yeah, pretty standard. The best listener and commentator gets awarded the trophy in the shape of a stylish badge to make your profile even more attractive! Remember, to have these badges on your profile makes you even more attractive for the artists. And have in mind that not only quantity but even more quality counts! So make sure you write something constructive when providing feedback.
Now, give those tracks a listen (and drop a line to the creator)!
This challenge runs until the end of the beta period.