When you redeem an iTunes Gift Card, the amount on the card credits to your Apple ID. You can use the credit in the iTunes Store, App Store, or iBooks Store as long as you sign in to each store with the same Apple ID. The credit is used for each purchase you make in a store until it’s gone.
Meanwhile, iTunes gift cards e-codes and big codes are very unpredictable and might be dangerous to apple ID account. Unlike physical cards, they can limit your account purchase.
Below is what a physical card looks like:
Below is what an Ecode (Scanned) looks like:
E-codes are also delivered through mails.
Some ecodes are good while some are dangerous to accounts, that’s why ecodes have limited needs and only vendors that are ready to risk it go for it.
Now, once you load some ecodes, you might get the error below:
It means the code has limited your account purchase and the whole account is now as good as useless.
That’s that on iTunes Gift Cards eCode And Problem Of Limited Purchase.