Maybe s/he doesn't want to waste their time doing that and instead the company is politely signaling to their users that they're being charged junk fees by continuing to use the iOS app. Which is quite fair and transparent behaviour. Why take on Apple when you can correctly inform your users and push them to give Apple the boot?
If the CEOs could sign a petition that had a sure chance of antitrust action against Apple's fees, every single one of them would be itching to sign.