Target is once again offering an extra deal on Apple gift cards: buy a $100 Apple Gift Card and get a $10 Target Gift Card. That works out to roughly a 10% discount overall. The promotion runs from August 27 to September 2. If you're interested, you can buy in store, where there doesn't seem to be a strict limit; if needed, you can always make multiple trips. If you have upcoming purchases on Apple's official website, this could be a good chance to stock up. After buying, be sure to load the balance into your own Apple account right away to reduce the risk of theft or fraudulent use.
This promotion is available both online and in stores. Online, the limit is 1. In stores, there is no clearly stated limit, so it may depend on whether the cashier allows the purchase. In the past, self-checkout could be used to buy third-party gift cards with a Target GiftCard, so if you're interested, you can give it a try.