> Are you saying it's actually possible to get an Apple user to subscribe without clearly displaying the payment amount or frequency?

Both are displayed by a system-controlled modal but even with that there are many stories of people not realizing/noticing the frequency. Apple has forced developers to place the frequency more prominently on their info screens but it's only helped so much. I have a hard time seeing a legitimate use for a weekly subscription other than to trick users. I almost think that Apple shouldn't allow that frequency or they should have extra vetting/restrictions/alerts for users. I know Apple sends out an email before they charge a recurring subscription (or at least I've gotten them for my yearly subscriptions) but maybe a push notification on the phone/tablet (that you could disable per-app) would be a another way to help prevent this type of fraud/scam.