You still haven't stated the reason for this claim. What's about "preposterous" for a 2 hours refund window ? Customer can fully test the app in those 2 hours and see if it fits him or not.

The problem isn't just the in money with the "it's only a buck or two for the app". You're trying to find an app you'll invest not just money, but time and your data. On iOS with this model it means you can spend 20-30$ for 5 different candidate apps and then choose one - or even find out you don't like any of them.

Now repeat this process for different types of apps that aren't multi-platform.

If an application can't deliver more than 2 hours of value, maybe it's not worth very much. It's not a movie. FWIW, the Apple app store doesn't have a formal time limit but you have to provide a reason.