Without that near monopoly there is no way they could maintain a 30% cut.

I admit, it sounds high to me - like I said above. But I also got 0 clue, for all I know 80% of that are their costs. 🤷 Lack knowledge to judge that. At least in digital space 70% go to the makers, and usually 20-25% remain at the end, not 2%-8% like with physical goods.