Earlier quoted context omitted.
Apple/Google revenue will see a big decline if those games are regulated. Most if not all the top grossing games on mobile follow the same spending pattern, and a big chunk of app stores' revenue come from those games.
And that's exactly the reason almost all mobile game are utter trash. Of course that was caused because the app-"economy" was broken from day one on: You couldn't and still can't call out fair prices on mobile software. People weren't and aren't willing to pay those. So you have to make the software "free" and sell your user's data, or charge one or two bucks and use some other immoral scheme to get your actual costs…
So now you're left with people who haven't tried better games, and with all the good-enough free ones, how can even a discounted price full game compete?