The Apple Store is a Business like any other Business.
There are strict rules of Apple that Developer must Adhere to in-order for Their Applications to be allowed to appear on the Apple Store.
The Developers pays Apple a Percentage of each Sale .
Apple does not Force anyone to Purchase any Applications appearing on the Apple Apps Store
That Responsibility is left to the End User ( you and me ) to perform our due diligence and research Before clicking the Purchase icon
As for Compatibility of software - if one spends a little more time explore a specific Application before purchase - you may see like in below image
Beyond that - honest, what does the use expect Apple to be more Forwards about things
ALL the Above is intended to informative and in the best interest of the Computer
