@raphaelgoulart: Equally there have been many entries that have broken this rule and were widely down-voted (Summer Chip 3 had several iirc).
Rules are rules, but its really down to the voter's discretion as to whether or not they chose to downvote an entry. Some people don't and won't care, while other's like me usually either cut an entry's vote in half/all 1. (I'm sorry Stinkbug :( )
The thing with album tracks is that there could be licensing issues as well, esp if botb chose to put it on their bandcamp. Fortunately I don't think such issues will be the case here (theoretically).