itch.io

I was thinking the Mac AppStore. To refuse to pay their fees is fine, but you would make more money. But you do what you are happy doing. 

You can keep the fee I paid. You might need it.

You could keep 100% of 100 sold apps, or keep 70% of 100 000 sold apps. You do the math.

I just payed for StarbaseSim. I followed the methods described. It is a non-starter.

Neither changing permissions or using terminal worked. 

I am using a 2020 MacBook Pro running Ventura 13.0.1 (It is usually stated when an app is too old for the latest systems, but I could not see any such warning before I payed). If you have a new version on the way I will wait a bit, but if not I think I should have my money back.