Lightning has two data lanes and this cable looks like it’s missing one of them. IIRC devices can use either lane depending on orientation of the plug so that would explain why data transfer was working for you. Does it stop working if you rotate the plug?
The first Dragon’s Dogma had a ton of small DLC too, so this isn’t exactly new. They even sold rift crystals. I guess a lot of players don’t realize how much DLC it was because the later editions and the ports came with most of it included.