User blog comment:TW6464/Reckoning DLC Leak. Via REDDIT/@comment-4835791-20130131085440/@comment-78.8.1.181-20130131202428

@ 1st Anon. If majority of ME players didn't play MP, there wouldn't be so many DLC for MP. Developers have connection with internet and every signle playthrougth in MP is registred just like every bought game. Developer compare how often and how big precent of registred players use MP.