Please explain what you mean by "code exchanged for adopts". If it's like the pony maker where you put a code back into the character creator and you get the character design back, then no, that's not allowed.
This is the deviation in question. Basically, you click stuff and get codes which each one corresponds to a specific result (item, adoptable, etc.). It's kind of a mystery adoptable and kind of not.
In my personal opinion, I wouldn't accept this to the group. This group is for adopting characters, and that seems more like you're adopting an in-game pet - something that can't be taken and used outside of your group/game.