> So how many years of updates do you expect for the price of a coffee, or even free? The developer has already spent hours developing the app, paid for equipment, paid the ongoing annual developer fees etc. and if they're a small-fry developer they'll be very lucky if they ever recoup that cost, let alone have an income stream to cover re-builds and testing.
Here's an idea: if the developer is completely done and totally "over it" when it comes to their app, release it as open source. Let others take up the effort instead of letting the app die and fade away into obscurity as abandonware.