In a disturbing development overnight, I've discovered that the Apple store no longer accepts my OneSmart card as a payment method. This means I can no longer easily pay for my HBO Now subscription, and I won't be able to subscribe to Hulu via the AppStore when its current billing cycle finishes (As of last month, I can't provide my OneSmart card to Hulu directly to them anymore either).

And even worse, I had to create another US iTunes account to download a FREE app for some craft hardware I purchased for my wife. Due to my billing status change, iTunes won't allow me to download any apps. And this app is only available in the US store.

I know many here use iTunes gift cards as a workaround. What are the safest ways to obtain these? So many of the gift card sites online look pretty dodgy.