That rumor doesn't make much sense, vanin. Steam does patches automatically, almost invisible to the user. I doubt Steam would have any trouble serving patches to Mass Effect players. I'm sure it was just about money, and EA wanting more of it.
EA is super greedy and has been for years. Why else do you think we get a new Madden and a new Tiger Woods every year with little to no innovation? They just want a piece of Valve's action. EA is, after all, a publisher.