Blind Box figures that have a DLC Code?

[Mo&Krill's Marriage Certificate]

I wasn't finding anything online about this, so I'll ask here. I just got a blind box bendy figurine (The boxes look like cans of bacon soup!) and in looking it over I noted inside there's a code for DLC with the figure. I purachsed it at gamestop, brought it home, and not only did I manage to get away with golden bendy, there was also a code for DLC inside. However, I can't seem to figure out what this code is, where I need to use it or if it's even a vaild offer anymore.

Does anyone else have these mini figures? I've bought and downloaded Chapters 2, 3 and 4 already, so is it just a code to unlock those chapters?

[Ink Hyaena]

The code is for bacon soup rewards in the Nightmare Run mobile game.

[Mo&Krill's Marriage Certificate]

That makes so much more sense. Thank you!