when you weigh up the costs and extra time of burning off each copy of the ps3 and xbox360 game with the extra data of 12 extra hd character models and their alternate costumes and all their speech files/ending movies and compare that to leaving those files on a HDD somewhere ready to upload them to any people who bought the game and want to shell out for those extra characters I think you'll find if anything burning content to close to a million disks that maybe 20% of those disks will ever pay to unlock them would probably cost more.
As for people having an issue with the difference between on disk dlc and day one dlc content is not just that it is being delivered to people in different ways, this content is completely different, The on disk dlc was ready to go when the game went gold, as in the game was finished, they have to start burning off the disks and preparing them for shipping worldwide, the time from when a game goes gold to when it actually arrives in your local gaming store can be upwards of months sometimes. Now what some companies do is during the wind down period while all the people who worked on the game are technically finished because they have no input in the distribution of their finished code so some companies will try and use those people to drum up some extra content, something they can offer as a day one dlc if you pre order the game or something that you get a download of for free with each new copy of the game, something to entice people to buy it, this ends up as day one dlc.
tl:dr
ondisk dlc - cutting up a finished product to try and get more money from your customers
day one dlc - Content made after a project was complete to encourage people buy the game day one and not used.
Why not check me out on youtube and help me on the way to 2k subs over at www.youtube.com/stormcloudlive
