From the Vault — originally published December 12, 2008. Some links, videos or prices may be out of date.

Infinity Ward Community Manager Robert “FourZeroTwo” Bowling responded to a forum post asking about DLC and playlist updates to Call of Duty 4. Here was his response:
“Glad to hear you enjoyed CoD:WaW. As for DLC for our games, we did three map packs for Call of Duty 2, ending with an impressive number altogether. For Call of Duty 4, we focused on including as many maps as we could out of box, and had 16 from DAY 1 (adding four more later for a total 20 Maps total).
Personally, I prefer to give the community as much as possible out of the box instead of making them wait and pay extra for them later. However, whenever possible (like with COD2) we continue to make maps if our development process allows for it.
It’s a bit of a catch 22 in gaming. Of course as a gamer you always want more, more more. If you include them out of box (shipped with game for no extra cost) then it’s just ignored and people demand more. If you instead, decide to get the game out and then worry about beefing up the map selection via DLC, people say “don’t nickle and dime me” or “this should have been included in the shipped game”.
Perfect solution, ship with a load of maps (like we did) and also release a lot of DLC (for free). In a perfect world, that would be fantastic. Regretfully in a realistic development environment, it’s near impossible. Unless your Criterion of course, with their magical DLC fairies ; )
In all seriousness though, I hear ya, and We’re always working on improving our development process and planning to ensure that we can deliver more and more community support in the form of updates / DLC and other forms of support for our future games. We have big plans for our future (still currently unofficial) projects.”