This sucks, but who is guilt for this, the giant publishers, why? because AppStores have a big tax , so competition that would lower the tax would solve the problem,

Is same with video streaming, the giants don't want other giants to get a big cut without working hard.

IMO , AppStore competition should be like web hosting, competition is large enough so you have enough choice to buy exactly what you want. Imagine if you want your web page to be visible on Apple stuff you need to pay 30% of your profits to Apple and only if Apple likes your page content.