Painful Purchase process: AMC theater gift card. Sold me an old phased-out gift card that does not allow you to check the balance online or purchase online. Went to the theater and tried to use it. Zero balance. Contacted customer service to dispute charge and "magically", balance appeared as indicated by their app. I was eventually able to use it once, and each successive time, there was a problem showing the right balance or making the purchase.
Useless App (iphone): Amateur-designed interface. Checking balance is neither real-time (you have to wait 4 minutes) nor accurate. And you can only "check" the balance ONE time, before they tell you to call their phone number - a phone number that directs you to a voicemail box.
Probably Fraud: If you don't use your gift card right away, guaranteed that it will be resold or churned. YOUR BALANCE WILL BE ZERO if you wait. Suspect their "90-day guarantee" is to save them from the credit card charge-back window.