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The process of going from an empty starting point to having a product catalog of In-App Purchases configured in iTunes Connect can be daunting, confusing, and can even involve lengthy waits while Apple’s website propagates your data to the sandbox environments.
Although this process might get frustrating at times, it is well worth the effort. As mentioned at the beginning of this hour, there is a great deal of money to be made from In-App Purchases, and ignoring their potential could cost you a lot of potential revenue.
Although it is possible to go all the way through to the process of submitting and publishing free applications in either the iOS or the Mac App Store without providing any financial information, you must provide this financial information for your application to support In-App Purchases.