Apple has emailed iTunes and App Store users an email about a new promotion that offers a 10% bonus when they add funds to an Apple ID account.
You can add funds from $1 to $200 to your Apple ID from a credit card or debit card for purchases of games, apps, books, movies, TV shows, iCloud storage, etc. When you do, Apple will addd an extra 10% of that amount to your account.
However, this isn’t an unlimited promo. It runs through March 14, so you have until Thursday to take advantage of it.