I don't think this is what the author was talking about. I think his complaint is less about control over his spending, but about the intrusiveness and confusio

I don't think this is what the author was talking about. I think his complaint is less about control over his spending, but about the intrusiveness and confusion the constant up-selling causes. He's not afraid of Nana spending a boatload on IAPs (though that has happened...), he's frustrated that these games are bombarding Nana with bright flashing buttons that have nothing to do with the core gameplay which he has already bought (either upfront or via IAPs), and making it harder for her to play the game. This is basically the native app equivalent of complaining about intrusive omnipresent banner ads, overlays, and interstitials. They're grossly damaging to the user experience. It's the mobile gaming equivalent of "okay, I clicked your ad and paid a subscription for your online magazine, can you stop bombarding me with even more ads now?".