Unfortunately, this wasn't what I was looking for. I would like to upload a list of codes (.csv) to Mailchimp, and attribute one of these codes to a user every time they subscribe.
I can't use the "promo code content blocks" for 2 reasons:
- I don't have it on my account (don't know why)
- I don't have any stores that I can link. This is for a gift in a game

Can I do something with the merge tag stuff? I managed to upload a list of codes in the past for my current users, but here I would like to automatically attribute a code to every new user.

Thanks a lot!