i expect those game updates didn't use bindiffs, they had to repackage the entirety of each updated file. when you consider that many developers do things like

i expect those game updates didn't use bindiffs, they had to repackage the entirety of each updated file. when you consider that many developers do things like compress all game content files into a few large archives, it's easy to see how that adds up. you end up re-downloading the same content repeatedly when they repeatedly make small changes to a few scattered files in one large archive.