If you think it's good for the app and your business, just do it. In what's most likely the worst case scenario, you wind up having to pay Lodsys the 0.575% of

If you think it's good for the app and your business, just do it. In what's most likely the worst case scenario, you wind up having to pay Lodsys the 0.575% of revenue from the app -- which is a lot less than you'd lose by not including IAP in the app. In many far more likely scenarios, you never have to pay anything because Apple succeeds in fighting off Lodsys on behalf of its developers.