I can't even remember all the Korean games I know that do this. Every single one I have ever played. Gunbound, Maple Story, some shitty dance rhythm browser game, Silkroad Online, Granado Espada, on and on and on.

If you want to talk "AAA" titles, there are dozens and dozens that do this. Just two examples, because I really don't want to waste too much time on this:

Saint's Row 3
DLC includes:
Unlockable Pack - Unlocks items, upgrades and bonuses that weren't chosen during normal gameplay.
Invincible Pack - This is literally DLC pack of cheat codes. Guns do more damage, never have to reload, etc.

Battlefield 3
DLC Includes:
Support Kit Shortcut - Unlocks all upgrades for the Support Class
(Three other specific class ones)
Vehicle Shortcut Bundle - Unlocks all upgrades for all vehicles
The Ultimate Shortcut Bundle - Unlocks all upgrade for all classes and vehicles


Place your faux outrage elsewhere. Even if you "play a lot of games," you don't know a whole lot about the industry trends as a whole.