Ah, some side quests, good idea. 
But I wouldn’t give points for voting and posting the xrns, this should be mandatory. And let’s not fuck around with peanuts for reviews. Either reviews should be mandatory, too, or 5 extra points for reviewing every single song. You don’t have to write a book about the songs, just a few words…
Check this.
@SimulatedZen
If you really like big shirts you can also have 5XL, no problem at all.