Good question. Anything over 90 days I would see as unreasonable.

So anyone getting a refund is probably a recent purchaser.

I don't know because I don't know the App store rules for these refunds. But if they do allow longer refunds it should have massive repercussions for any App store developers that want to stay in business in the longer term if they are basing their App on someone else's API, even with permission.

It's a $9.99 annual subscription. The fact they are not automatically refunding the part of the year that wasn't provided is offensive.

They can’t. The App Store head never had any mechanism for developers to initiate refunds in any way, let alone partial refunds.

You’re raging against these guys for not doing something that they have no ability to do. Hardly fair.