Why does PS3 games have DLC if its on a Blue ray?

[ultraslick]

its Blu-Ray!!!!!!!!!!!!!!!!!
Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
too many times, its driving me nuts... BLU, not blue ray.

and DLC is finished after a retail release of a game, they can't retroactively put this content on a BLU-RAY disc, or any disc, unless its a goty release or something down the road, but thats not the same argument.

the real problem exists because there are so many multiplats for PS360, many of which might have included that DLC from the get-go if it were not for the disc capacity of the 360.