I don't think they are including the DLC in their GotY / Collection / etc. releases any more, at least not all of it. Some of us here have been waiting for ages for a truly complete digital release of ME2, but it has never appeared, and I think (not sure though) that EA has even announced somewhere that they don't intend to release one.
Lovely. Guess I'll just stay away from the whole brand then. Astounding how enough money is never enough money, and they have to find ways to f*** some extra pennies out of loyal customers.
I'll bet there are hacker-pirates who circumvent this code routine and thus don't get punished the same way. That makes it feel extra fair.