So don’t sell in the App Store. Set up all that distribution, collect correct sales taxes for every country in the world, accept payment from anywhere — deal with a potentially high rate of chargebacks and the fees associated with that, also create a search and discover platform so that people can find your game nobody ever heard of until they visited the App Store. Also, do it in nearly every language on the planet, accepting almost every currency. Also handle actually hosting your content and securing downloads to boot authorized devices.

I’m not sure 30% is expensive enough compared to doing all of that yourself.

Dark Room would not have sold $800,000 anywhere else. The author even said Google Play was an order of magnitude less than Apple.. so is an order of magnitude worth 30%? It seems like a lot of people would trip over a dollar to save a nickel.