I've sold downloadable software for Windows and Mac for 20 years and I have never used any of the app stores. I just can't be arsed with jumping through their endlessly changing hoops, only to give a large chunk of the sales to the store.

I heard that when the MS Store started they started off paying a bounty to every developer who added an app, so they could populate the store. Consequently they ended up with loads of reskinned open source apps and their store was garbage from day one.