EA sold you a copy of the song along with a license to use that song in the context of playing the game. If the copy was sold with a stipulation that you could

EA sold you a copy of the song along with a license to use that song in the context of playing the game. If the copy was sold with a stipulation that you could not use the copy after a certain period of time that's fine, but that's not what happened. If EA was sending out copies of songs that it didn't have the right to do under its licensing agreements, then it sounds like people could probably easily sue to get the money the paid for DLC back (since the transaction was fraudulent as EA didn't have the right to sell what it sold, though ianal).